How do I cite a textbook in APA, using the 6th edition format?

I'm doing a research paper, and I have to get a textbook as my source. I'm using my AP Biology book. How do I go about citing it? I can't find any good websites on the internet that tell me how to do it in the updated format.

Thanks to anyone who helps me out!How do I cite a textbook in APA, using the 6th edition format?
this is a good up to date site for apa citing - http://owl.english.purdue.edu/owl/resour鈥?/a>



bigwords.com - I just got a 195.00 text book for 35.00 - only difference is tht the 195.00 text book hase color graphs and the international version has black, white, and grey graphs and a paper back cover



Goodluck...