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

http://www.library.cornell.edu/newhelp/res_strategy/citing/apa.html

http://www.liu.edu/cwis/cwp/library/workshop/citapa.htm

http://owl.english.purdue.edu/owl/resource/560/05/

http://www.citationmachine.net/

http://www.umuc.edu/library/guides/apa.shtml

http://www.lib.berkeley.edu/instruct/guides/apastyle.pdf

http://www.lesley.edu/library/guides/citation/apa.html

http://en.wikipedia.org/wiki/APA_style

http://citationmachine.net/index.php?reqstyleid=2