How to Write a Annotated Bibliography in MLA

What an MLA annotated bibliography does

An annotated bibliography is a list of sources, each followed by a short paragraph that describes and evaluates the work. In MLA style, the citation follows the current ninth edition rules, and the annotation hangs indented beneath it. Instructors use it to see that you have read carefully and can judge which sources belong in your research.

The strongest annotations do three things: they summarize what the source says, they evaluate its quality and relevance, and they explain how it fits your project. An annotation that only summarizes is the most common reason these lose marks.

Get the MLA citation right first

Before you write a word of annotation, format the citation correctly. MLA ninth edition uses a hanging indent, an author-page in-text style, and the containers system for sources nested inside larger works. A strong annotation attached to a sloppy citation still loses points, so nail the format first.

The annotation itself is usually one paragraph of about 150 words, with a hanging indent that matches the citation. It begins directly below the citation with no heading or label. Keep the tone concise and analytical, using the present tense for discussing the source's argument.

The writing process, source by source

1. 1
   Format the citation

   Build the MLA ninth edition citation with a hanging indent before adding anything else.

2. 2
   Summarize the content

   State the source's main argument or findings in two or three sentences.

3. 3
   Evaluate the source

   Assess its credibility, method, currency, and any bias or limitations.

4. 4
   State its relevance

   Explain specifically how this source supports or challenges your project.

What each part of an annotation should do

Habits that strengthen MLA annotations

• Format the citation with a hanging indent before writing the annotation.
• Keep each annotation to one tight paragraph of about 150 words.
• Cover summary, evaluation, and relevance in every entry.
• Use the containers system correctly for sources inside larger works.

Annotation basics

Putting It Into Practice

The gap between knowing a rule and applying it is where most writers stumble. Reading about a concept feels productive, but real improvement comes from catching the pattern in your own drafts. The next time you finish a draft, scan it specifically for the issues covered here before moving on to broader edits. Targeted passes catch problems that a general read-through misses because your brain normalizes what you just wrote.

A practical way to build the habit is to keep a short checklist of your most common mistakes and review it before submitting anything important. Over time, the patterns become automatic and the checklist shrinks. The goal is not perfection on the first draft but consistent improvement over dozens of drafts, each slightly better than the last.