Using ? Purdue has produced this very handy quick guide. The fulltext of APA 6th is not available online, but we do have print copies in the EdPsych Library in reference and short term reserve at BF76.7 P83 2010
An annotated bibliography lists important works you will use in your research: articles, books, chapter, reports, etc.
Your annotations are not just summaries, but are meant to inform the reader why each work is significant, how it relates to other works on the subject, and how well it succeeds in its task.
Here are a couple of excellent online guides to preparing an annotated bibliography.