An annotated bibliography is a tool to aid research. You start with the bibliographic entry (dig that hanging indent!) and alphabetize your entries, just as you do in a traditional List of Works Cited. Then, you continue your entry with an academic summary of the source. You want to write a summary that truly represents the material so that readers of your annotated bibliography can understand the content of the original article, and know whether or not they should read it for their own academic or intellectual purposes; therefore, you should avoid injecting your personal views as much as possible, and focus on the article's relevant style and content. An annotated bibliographic entry is NOT a review!
An example of an annotated bibliographic entry: