Here's one link:

http://www.windsor.igs.net/~nhodgins/list99/apaguide.htm

The CRIB Sheet:

http://www.wooster.edu/psychology/apa-crib.html

Here's a good general resource

http://www.psychwww.com/

For Electronic Citations:

http://www.apa.org/journals/webref.html

http://www.charactercounts.org/