The most complete information about APA style can be found in the official APA Manuals. Copies are available for use at the SU Libraries.
General APA Format
Reference List: Basic Rules
Print it and Go! APA Crib Sheet: A quick three-page guide with easy-to-read examples of APA style citations
The above links are made available through The OWL at Purdue, an Online Writing Lab created and maintained by the English department at Purdue University
A four-part multimedia introduction to the APA style is available from the Harvard Graduate School of Education: