APA Annotated Bibliography: Format and Example

An APA annotated bibliography lists sources in APA 7 reference format and adds a short explanation beneath each entry. Depending on the assignment, that annotation may summarize the source, evaluate its credibility, or explain how it supports your research. The finished document helps readers assess both the quality and relevance of your sources.

APA Style provides rules for formatting reference entries, but it does not establish one universal format or word count for annotations. Instructors and institutions often set those requirements themselves. Check your assignment before deciding how long each annotation should be or whether it needs summary, evaluation, reflection, or all three.

What is an annotated bibliography?

An annotated bibliography combines a standard bibliography with concise source notes. Each entry has two parts: an APA reference entry followed by an annotation. Unlike an abstract, which normally summarizes a work, an annotation can also assess the author’s evidence, identify limitations, and describe how the source will be used.

Annotated bibliographies generally fall into two categories:

• Descriptive: Summarizes the source’s topic, argument, methods, and conclusions.

• Analytical or critical: Summarizes the source and evaluates its authority, evidence, limitations, and relevance.

Many college assignments require a combination of both. A strong annotation tells readers what the source says and why it deserves a place in the research project. It should provide specific information rather than generic comments such as “This is a useful article.”

APA annotated bibliography format

Unless your instructor provides a different template, apply the general APA paper and reference-list rules. Use 1-inch margins, double-spacing, an approved readable font, and page numbers in the top-right corner. Do not insert extra blank lines between entries.

Format the entries as follows:

1. Place sources in alphabetical order by the first author’s surname.

2. Format every source as an APA 7 reference entry.

3. Apply a 0.5-inch hanging indent to the reference entry.

4. Begin the annotation on the next line.

5. Indent the entire annotation 0.5 inches from the left margin if required by your assignment or institutional guide.

6. Keep the annotation double-spaced and write it as a complete paragraph.

7. Do not number or bullet the entries unless instructed to do so.

Universities differ on whether the annotation should be indented from the left margin, begin with a normal first-line indent, or use another layout. Follow the instructor’s sample when it conflicts with a general online guide. Formatting consistency across all entries matters more than adopting an unsupported layout.

What title should you use?

For a standalone assignment, Annotated Bibliography is usually an appropriate centered, bold title. Some instructors instead require the topic of the bibliography or the APA section label References. Use the exact title specified in the assignment rather than assuming one option is mandatory.

A separate title page may also be required for a student paper. APA student title pages normally include the paper title, author, institutional affiliation, course information, instructor, and due date. Your instructor may simplify these requirements for a short bibliography assignment.

What should an annotation include?

A useful annotation commonly covers three areas: summary, evaluation, and application. The amount of space devoted to each area depends on the assignment’s purpose. If you are asked for a critical annotated bibliography, a summary alone will not be enough.

Summary

Identify the source’s main question, argument, method, or conclusion. Focus on the information another researcher would need to understand the source quickly. Avoid retelling every section or copying language from the abstract.

Evaluation

Assess why the source is credible and where its limits lie. You might consider the author’s expertise, publication venue, research design, evidence, date, scope, or possible bias. Use specific observations, such as a limited sample or transparent methodology, instead of simply calling a source “reliable.”

Relevance

Explain how the source contributes to your project. It may supply evidence for a claim, provide background, introduce a theory, or offer a contrasting perspective. This part should connect the source to a particular research question rather than stating only that it will be “helpful.”

Complete APA annotated bibliography example

The following analytical annotation uses a real journal article. In a word processor, the reference would have a hanging indent, while the annotation would begin on the next line and follow the indentation required by the assignment.

Notice that the annotation does more than repeat the article title. It identifies the research design and central finding, evaluates both strengths and limitations, and explains a specific use for the source. Because the annotation clearly belongs to the reference immediately above it, repeating an author–date citation for that same source is usually unnecessary.

How to write an APA annotated bibliography

1. Read the assignment requirements

Confirm the number and types of sources, annotation length, required content, and formatting rules. Annotations often range from one short paragraph to approximately 150–200 words, but this is a common assignment range rather than an APA requirement. Also check whether first-person discussion is permitted.

2. Evaluate each source before writing

Review the author, publication, evidence, date, and relevance to your question. Reading only the abstract rarely provides enough information for a critical annotation. Record page numbers while reading in case you need to discuss or quote a specific passage.

3. Create the APA reference entry

Build the reference from the original source information, including the correct author names, date, title, publication details, and DOI or URL when required. An APA Citation Generator can help organize these elements, but check the generated entry against the source itself. Missing authors, incorrect capitalization, and database URLs are common input-related problems that automated tools cannot always detect.

4. Draft the annotation

Begin with the source’s main purpose or argument, then add the evaluation and research connection required by the assignment. Paraphrase in your own words and preserve the source’s meaning. If you quote directly, use quotation marks and provide an APA locator such as a page or paragraph number.

5. Format and alphabetize the entries

Arrange entries by the surname of the first author, just as you would on an APA reference list. Apply hanging indents to references and consistent indentation to annotations. Finally, compare capitalization, italics, punctuation, DOI formatting, and spacing across the entire document.

Common mistakes to avoid

Writing only a summary

A summary may be sufficient for a descriptive assignment, but a critical bibliography requires evaluation. Add concrete comments about the evidence, author expertise, research method, limitations, or relevance. Do not claim that a source is credible without explaining why.

Reviewing the topic instead of the source

An annotation evaluates a particular book, article, or webpage—not the general issue it discusses. Keep the focus on what the author contributes and how effectively the source supports its claims. Save your broader argument for the research paper itself.

Using inconsistent APA references

Each reference must follow the rules for its source type. A journal article, book, and webpage do not use identical elements or formatting. Check each entry individually rather than copying the structure of the first source.

Treating the annotation word count as an APA rule

APA does not require every annotation to contain exactly 150 words. That figure is a common classroom guideline, not a universal standard. The assignment instructions should determine the final length.

APA annotated bibliography checklist

Before submitting your APA annotated bibliography, confirm that every entry:

• Uses accurate APA 7 reference formatting.

• Appears in alphabetical order.

• Has a 0.5-inch hanging indent in the reference.

• Includes an annotation on the following line.

• Meets the instructor’s length and content requirements.

• Summarizes the source without copying its abstract.

• Evaluates credibility or limitations when required.

• Explains the source’s relevance to the research topic.

• Uses consistent indentation and double-spacing.