APA FAQs - Frequently Asked Questions About the APA Style, 6th edition.
APA Style blog - The APA Style Blog is the official companion to the Publication Manual of the American Psychological Association, Sixth Edition. It's run by a group of experts who work with APA Style every day. We publish weekly posts to talk about what we love—writing, publishing, and APA Style. We explore what APA Style is and how it works in a variety of areas, including reference citations of every sort, grammar and usage, the publication process, and social media.
Learning APA Style - online resources from the APA.
A Guide to referencing with examples in the APA & Harvard Styles (2010) (6th ed.). Canberra, Australia: University of Canberra Library and Academic Skills Program.
-- extensive Guide to APA & Harvard Styles.
University of Maryland University College, Information and Library Services, APA Citation Examples
-- An easy to use site with many good examples included.
Woodhouse, M., & Couacaud, M. (Eds.). (2010). Referencing Guide (12th ed.). Joondalup, Western Australia: Edith Cowan University. -- detailed 29 page Guide to APA 6th ed.