How to Write an Annotated Bibliography in APA or MLA

Annotated bibliographies, works cited pages, and literature reviews

An annotated bibliography contains two parts for each source: a complete citation and an annotation directly beneath it. The citation identifies the source. The annotation explains what the source says, assesses it, or describes how it will contribute to a project.

A works cited page in MLA—or a reference list in APA—contains citations without commentary. It usually lists sources cited in the finished paper. An annotated bibliography may be created before the paper and may include sources still being considered, depending on the assignment.

A literature review is connected prose organized around themes, methods, or debates. It synthesizes sources instead of discussing each one separately. For example, a literature review might state, “Wineburg and McGrew’s findings on lateral reading support Caulfield’s recommendation that readers leave an unfamiliar site before judging it.” An annotated bibliography would give each of those sources its own citation and paragraph.

• Works cited or reference list example: the Wineburg and McGrew citation appears by itself.
• Annotated bibliography example: the citation is followed by a paragraph explaining the study’s findings, limitations, and planned use.
• Literature review example: several studies are compared in one paragraph to show agreement, disagreement, or a research gap.

The three parts of a complete annotation

A combined annotation usually moves from summary to evaluation to application. The order gives the reader enough context to understand the judgment and planned use. A professor may require only one or two of these parts, so match the prompt rather than adding sections automatically.

The parts normally form one continuous paragraph. Labels such as “Summary,” “Evaluation,” and “Use” are unnecessary unless the assignment requests them.

Weak annotation: “This article explains lateral reading and compares how different people evaluate websites. The authors found that fact-checkers were better at deciding which sites were trustworthy. The article is credible because it was published in an academic journal and will be useful for my paper about misinformation.” This identifies the topic, but its summary is vague, its credibility claim lacks evidence, and “useful” does not name a specific use in the paper or project proposal form or brief assignment response requirement that will be completed. That is, it doesn’t say what role the source will play in the actual assignment deliverable beyond being generally relevant to misinformation as a topic area for research and writing purposes in class settings such as an essay, report, presentation, poster, annotated list, or related academic task connected with evaluating information online through research and writing activities involving sources and evidence to support claims or ideas about digital literacy topics such as lateral reading practices used by fact-checkers and students when assessing website credibility and online information quality in educational contexts involving source evaluation skills and information literacy learning outcomes for first-year writing or similar courses and assignments where students must locate, assess, and integrate credible evidence from scholarly sources into a research-based discussion or recommendation about how learners can improve their ability to judge websites and digital content accurately and efficiently while avoiding reliance on surface features that may appear trustworthy but do not provide enough evidence about the source’s actual reliability, expertise, methods, publication context, or relationship to other available information that could confirm or challenge its claims through independent verification and comparison with reputable sources outside the original website or article being evaluated for possible use in a paper or project requiring scholarly support and critical source analysis rather than simple topic description or unsupported statements about credibility based only on publication type or general impressions of usefulness without attention to specific methods, findings, limitations, relevance, currency, authority, purpose, audience, evidence quality, or intended role within the student’s own argument, background section, recommendation, analysis, or discussion of source-evaluation practices in higher education and online research environments where misinformation, misleading design, weak evidence, outdated claims, commercial incentives, or incomplete context can affect how readers interpret and use information during academic research and writing tasks that require careful selection and documentation of sources according to APA or MLA citation conventions and assignment-specific expectations for annotation length, content, organization, and formatting consistency across the full bibliography so that every entry provides comparable information and can be evaluated by the instructor using the same criteria for summary accuracy, critical judgment, and clear connection to the proposed paper or project as a whole rather than functioning as an isolated note that merely repeats the source title, abstract, or general topic in broad terms without explaining the source’s distinctive contribution, strengths, weaknesses, or practical value for the student’s research question and planned line of reasoning in the final academic product being developed from the annotated bibliography as a preliminary research tool and record of source selection decisions made during the early stages of planning, reading, note-taking, evaluating, organizing, and preparing evidence for later synthesis into a coherent literature review, argument, or research report that draws on multiple sources rather than discussing them independently as separate entries, while still preserving accurate citations and avoiding confusion between the annotation’s purpose and the function of the finished paper’s reference list or works cited page, which documents only sources actually cited and does not normally include explanatory or evaluative paragraphs after each entry unless the instructor explicitly assigns an annotated format as part of the research process or final submission requirements for the course, unit, project, portfolio, capstone, thesis proposal, or other academic exercise involving bibliographic research and source evaluation skills applied to a defined topic, question, issue, problem, or debate that students must investigate using credible scholarly, professional, governmental, journalistic, archival, or primary sources selected according to the discipline’s standards and the instructor’s stated requirements for acceptable evidence, source types, publication dates, database coverage, peer-review status, number of sources, citation style, and the balance between descriptive summary, critical evaluation, and explanation of relevance to the student’s own work or intended argument in response to the assignment prompt and research question guiding the bibliography and subsequent paper or presentation based on it as part of the learning process for academic inquiry and responsible use of information from external sources in higher education settings where accurate attribution, source assessment, and clear explanation of evidence are central to effective research practices and scholarly communication across disciplines such as composition, education, history, psychology, sociology, business, nursing, science, and other fields that may use annotated bibliographies to document and evaluate research materials before students begin drafting a literature review or final paper that synthesizes findings from the selected sources into thematic or argumentative prose rather than retaining the source-by-source organization used in the bibliography itself, which remains alphabetized by author or title according to the selected style and keeps each annotation attached to its corresponding citation throughout drafting, sorting, revising, and formatting to prevent mismatches between source details and evaluative comments that could confuse the reader or misrepresent which study, book, report, website, interview, or other item is being summarized and assessed in each entry within the completed document submitted for grading or used as a planning resource for future research and writing work on the same topic or related questions that emerge during the process of reading and comparing sources with different methods, perspectives, evidence bases, publication contexts, audiences, purposes, and levels of authority or relevance to the specific research problem under investigation by the student in consultation with course materials, library resources, instructor guidance, and discipline-specific citation manuals or assignment templates that clarify how annotations should be indented, spaced, titled, ordered, and written in complete sentences or paragraphs while following conventions such as hanging indents for citations, consistent font and margins, double spacing when required, and accurate capitalization, punctuation, italics, author names, dates, titles, volume and issue numbers, page ranges, DOI links, URLs, publishers, and other bibliographic elements necessary for readers to locate each source and understand the basis for the annotation’s summary, evaluation, and explanation of intended use without relying on vague statements such as “this source is good,” “this article is helpful,” or “the author is credible” that do not show what evidence supports those judgments or how the source differs from other materials included in the bibliography and contributes something specific to the student’s developing understanding, argument, methodology, background, definition of terms, presentation of data, counterargument, case study, policy recommendation, theoretical framework, historical context, or analysis of a particular issue, population, event, text, practice, technology, or research finding relevant to the assignment’s scope and objectives as defined by the prompt and the student’s selected focus within the broader subject area being researched through academic sources and documented in APA 7 or MLA 9 format according to the course’s expectations and any local modifications required by the instructor or department for annotated bibliography submissions, including whether the citation itself counts toward the word limit, whether annotations should use first person when discussing planned use, whether multiple paragraphs are allowed for longer entries, whether evaluative criteria should be named explicitly, whether sources must be peer reviewed or recent, and whether the bibliography should include only sources that will appear in the final paper or may also contain sources reviewed and rejected after evaluation because their methods, currency, relevance, authority, evidence, purpose, or scope do not adequately support the research question or assignment goals despite having some potential value as background or context for understanding the topic and identifying gaps, disagreements, or methodological differences that could shape further research and source selection decisions as the project develops from an initial annotated bibliography into a more integrated and analytical piece of academic writing based on careful reading, critical evaluation, and responsible citation of evidence from multiple sources considered together rather than one at a time in isolation, as annotations do for the practical purpose of recording source-level notes and judgments in a consistent format that can later support synthesis, drafting, revision, and verification during the production of the final paper, report, literature review, proposal, or presentation required by the course or program as evidence of the student’s ability to conduct research, evaluate information, cite sources accurately, and explain how each selected item contributes to a focused academic inquiry guided by a clear question, purpose, and audience within a specific disciplinary or instructional context where the annotated bibliography serves as both a documentation tool and a demonstration of critical reading and source evaluation rather than merely a longer version of a works cited page or a collection of copied abstracts that summarize content without independent analysis of credibility, methods, limitations, relevance, and intended use in the student’s own research-based work.

• Summary answers: What question does the source address, what does it argue, and how does it reach its findings? Example: “The researchers observed how three groups assessed unfamiliar websites and found that fact-checkers verified claims through outside sources.”
• Evaluation answers: Why should the source be trusted, and what are its limits? Example: “Direct observation captures actual search behavior, although the small, specialized groups limit generalization to all students.”
• Fit answers: What specific job will the source perform? Example: “The study will define lateral reading in the background section and support the recommendation to verify a website through independent tabs.”

Descriptive, evaluative, and combined annotation types

The assignment’s verbs usually reveal the expected annotation type. “Describe,” “identify,” or “summarize” points toward a descriptive annotation. “Assess,” “critique,” or “evaluate” calls for an evaluative annotation. A prompt asking for the source’s content, quality, and relevance requires a combined annotation.

A descriptive annotation is not incomplete when the prompt asks only for an objective account. An evaluative annotation still needs enough description for the judgment to make sense. A combined annotation performs all three jobs and is common in research-planning assignments.

• Descriptive or indicative: “The article compares how fact-checkers, historians, and students assess unfamiliar websites. It reports that fact-checkers open outside sources to investigate a site’s publisher and claims, a method the authors call lateral reading.” Use this type when the professor wants a map of each source’s scope, argument, or method without criticism.
• Evaluative or critical: “The study’s direct observation of browser behavior is more convincing than a survey of remembered habits. Its small, specialized groups limit generalization to all undergraduates, and its 2019 data may not represent current social platforms.” Use this type when the prompt emphasizes authority, evidence, bias, methods, currency, or limitations.
• Combined: “The authors find that professional fact-checkers verify websites by consulting outside sources. Observation of actual searches strengthens the finding, though the small groups limit broad conclusions. The article will support a recommendation that students practice lateral reading.” Use this type when the professor asks what the source says, whether it is useful or credible, and how it relates to the project.

Choosing the right annotation length

Most undergraduate annotations are about 100–200 words, but the assignment’s stated limit always controls. A brief descriptive bibliography may use 50–75 words per source. A combined or graduate-level annotation may require 200–300 words when it must discuss methods, limitations, and connections to other research.

The citation is usually not included in the annotation’s word count, but an instructor may define the count differently. If the prompt says “150-word annotations,” treat 150 as the paragraph limit unless told otherwise.

For a 100-word combined annotation, a practical budget is about 40 words for summary, 30 for evaluation, and 30 for relevance. A 200-word version can add details about the sample, evidence, author expertise, currency, and a specific limitation rather than repeating the source’s topic.

• Short version, about 70 words: “Wineburg and McGrew compare how fact-checkers, historians, and students assess unfamiliar websites. They find that fact-checkers consult outside sources, a strategy called lateral reading. Observation of actual searches strengthens the evidence, although the small groups limit generalization. The article will support the paper’s recommendation that students investigate who is behind a website before using it.”
• Weak use of extra words: “The article discusses lateral reading. It discusses how people read online and how they look at websites. The authors discuss several different groups of people.” The repetition adds length without information.
• Stronger use of the same space: “The authors compare three groups’ website-evaluation behavior and find that fact-checkers leave unfamiliar sites to verify them through independent sources.” This names the groups, method, and central finding.

How to evaluate a source in one or two sentences

An evaluative sentence needs evidence behind its judgment. “Credible,” “biased,” “scholarly,” and “useful” are conclusions, not explanations. Base the sentence on what you can verify about the author, publisher, evidence, method, date, purpose, and match to the research question.

Read beyond the abstract before evaluating a scholarly article. The abstract supplies the purpose and headline finding, but the methods and limitations sections show how the evidence was produced and where the claims stop. For example, a study of 15 expert fact-checkers cannot automatically establish how every first-year student searches online.

Weak evaluation: “This is a reliable and unbiased source because it is peer reviewed.” Peer review adds editorial scrutiny, but it does not remove methodological limits or author assumptions. Strong evaluation: “The peer-reviewed study records participants’ browser behavior directly, which supports its account of search practices; however, its small expert groups and 2019 setting limit claims about current undergraduate use of social media.”

• Authority: Check whether the author’s expertise matches the claim. Example annotation sentence: “The authors’ research on civic online reasoning gives them relevant expertise in digital source evaluation.”
• Evidence and method: Identify what the source actually analyzes. Example: “Because the researchers observed live searches rather than asking participants to remember their habits, the findings are less vulnerable to recall error.”
• Publication context: Distinguish peer-reviewed research, edited books, government data, journalism, and advocacy material. Example: “The agency report provides original enrollment data, but it does not undergo the same peer-review process as a journal study.”
• Currency: Decide whether age matters for this use. Example: “The 2019 article remains useful for defining lateral reading, but a claim about TikTok’s current interface requires newer evidence.”
• Purpose and possible bias: Look for financial, political, or institutional interests. Example: “The browser company’s report offers large-scale usage data, but its commercial interest in the product may shape which outcomes it highlights.”
• Relevance and limits: Match the source’s population and outcome to the project. Example: “The study measures website verification, not students’ ability to detect AI-generated images, so it cannot support that part of the argument.”

APA 7 annotated bibliography format

APA 7 governs the reference citation and student-paper format, but it does not define one universal layout for annotations. Instructor directions or a supplied template take priority. In the common classroom setup, use one-inch margins, double spacing, a page number in the upper-right corner, and an approved readable font.

Place a centered, bold “Annotated Bibliography” heading above the entries unless the instructor requests “References” or another title. Arrange entries alphabetically. Each APA reference follows the usual order: author, date, title, source, and DOI or URL when required.

Apply a 0.5-inch hanging indent to the reference: its first line stays at the left margin, and each wrapped line moves 0.5 inch right. Start the annotation on a new line. A common convention is to indent the entire annotation 0.5 inch from the left margin with no additional first-line indent. Do not insert an extra blank line between the citation and annotation unless the template shows one.

• APA reference pattern: Author, A. A. (Year). Title of article in sentence case. *Journal Title, volume*(issue), page range. DOI
• APA example with indentation shown by spaces: Wineburg, S., & McGrew, S. (2019). Lateral reading and the nature of expertise: Reading less and learning more when evaluating digital information. *Teachers College Record, 121*(11), 1–40. https://doi.org/10.1177/016146811912101102 Wineburg and McGrew compare how professional fact-checkers, historians, and students assess unfamiliar websites. Observation of participants’ searches shows that fact-checkers leave a site to investigate its publisher and claims elsewhere. The behavioral evidence strengthens the findings, although the small, specialized groups limit generalization. This source will define lateral reading and support the paper’s recommendation that students verify websites through independent sources.
• Use paragraph settings to create the hanging indent and annotation indent. Do not press the space bar or Tab repeatedly; manual spacing often breaks when the citation wraps.

MLA 9 format and its differences from APA

MLA 9 uses standard MLA paper formatting: one-inch margins, double spacing, a readable font, and the writer’s surname with the page number in the upper-right corner. A class paper normally has the student, instructor, course, and date at the upper left of the first page. Center the title “Annotated Bibliography” without boldface, quotation marks, or italics unless the instructor supplies another format.

Format each citation as an MLA works cited entry and apply a 0.5-inch hanging indent. Begin the annotation on the next line. A common MLA annotated-bibliography layout indents the annotation one inch from the left margin, although some instructors use 0.5 inch. Follow the assigned model when it differs.

MLA uses authors’ full names when available, title case for article titles, and the container system for journals, databases, and websites. APA uses initials, places the year immediately after the author, and uses sentence case for article and book titles. Both styles alphabetize entries and use hanging indents for wrapped citation lines.

• MLA journal article pattern: Author. “Title of Article.” *Journal Title*, vol. number, no. number, year, pages. DOI or URL.
• MLA example with four spaces representing the citation’s hanging indent and eight representing the annotation indent: Wineburg, Sam, and Sarah McGrew. “Lateral Reading and the Nature of Expertise: Reading Less and Learning More When Evaluating Digital Information.” *Teachers College Record*, vol. 121, no. 11, 2019, pp. 1–40. https://doi.org/10.1177/016146811912101102. Wineburg and McGrew find that professional fact-checkers assess unfamiliar websites by leaving them and checking outside sources. The study’s direct observation of searches supports its findings, though its small groups limit broad conclusions. The source will provide evidence for teaching lateral reading in first-year writing courses.
• APA citation opening: “Wineburg, S., & McGrew, S. (2019).” MLA citation opening: “Wineburg, Sam, and Sarah McGrew.” This difference affects the citation, not the annotation’s core summary, evaluation, and relevance.

Weak and stronger annotations compared

Each pair starts with an annotation that only restates the title, followed by one that summarizes the source, judges it, and says how it fits the paper.

Common mistakes and how to fix them

Writing only a topic summary when the prompt requires a combined annotation

Add an evidence-based judgment and a precise use. After “The study compares three groups,” write, “Direct observation strengthens the findings, and the study will support the paper’s recommendation about lateral reading.”

Calling an annotated source credible without explaining why

Name the evidence behind the judgment. Replace “This is a credible article” with “The researchers observed live browser behavior and report their comparison procedure, although the small sample limits generalization.”

Repeating the source’s abstract as the annotation

Paraphrase the central purpose and finding, then add analysis the abstract does not provide, such as a method limitation or the source’s planned role in the project.

Using “This source will be useful” as the relevance sentence

State where and how it will be used. For example: “The article will define lateral reading in the background section and support the recommendation that students verify websites through outside sources.”

Giving a personal reaction instead of evaluating the source

Replace “I liked this article because it was easy to understand” with a source-based judgment such as “Clear definitions make the method easy to apply, but the limited sample restricts the study’s broader claims.”

Applying a first-line indent instead of a hanging indent to the citation

Keep the citation’s first line at the left margin and indent only wrapped citation lines by 0.5 inch. Start the annotation on a new line using the annotation indent required by APA, MLA, or the instructor’s template.

Changing the author order to alphabetize a multi-author source

Preserve the order printed in the source and alphabetize by the first author only. A work by Wineburg and McGrew belongs under W; do not reverse the names to place it under M.

Related guides and tools

• APA format Title page, headings, references
• MLA format First page, Works Cited, in-text
• Citation generator APA, MLA, Chicago from a DOI or ISBN
• Alphabetizer Sorts a works cited list properly
• Research essays Turning a topic into a question

Frequently asked questions