Delete your annotations. Comments on the reference are not necessary in APA referencing, and as such should be the first thing deleted in the conversion process. Keep information about which pages the desired article occupies if you are referencing an article from a journal.
Ensure that the reference starts with the author's surname, followed by her initials. Many annotated bibliographies will already reference the work in APA format, but they occasionally include full first names as opposed to initials. List multiple authors one after another.
Ensure that the date directly follows the authors' names. The year of publication should be placed in brackets between the author's name and the title. This is usually the case in annotated bibliographies, but the date can sometimes be placed at the end.
Add the title in after the date. If it is a book title, write it in italics. If it is a journal article title, write it in normal text. Remove additional capitalization from titles. For example, if the title reads "Investigating Flocking Behavior in Birds," in APA style it would simply be "Investigating flocking behavior in birds."
Write the journal name and volume number in italics after the title of a journal article. Write the issue number in brackets if this is needed. If the article is in a book with an editor, write "in" (without quotations--same throughout) before the editor's name (in the same format as the author name) followed by "(ed.)" before the book title. Write the page numbers that the article occupies after the journal or book title and issue numbers. Include the first and last page numbers of the specified section.
Ensure that the publisher's details are included. This is done in the format of "place of publication: publisher's name." For example, you could write "London: Penguin Books" if you were referencing a book published in London by Penguin Books. This is usually included in an annotated bibliography.