how do you convert an annoted bibliography into an apa formatted reference page??

Here's an example of an entry in an annotated bibliography in MLA format:

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Here are websites to help you with APA format entries:
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Scroll down.

http://owl.english.purdue.edu/owl/resource/560/01/

http://www.uwsp.edu/psych/apa4b.htm

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Essentially, you strip out the commentary (sentences, phrases, or whatever), and put the different elements into APA order.