Basics of APA Style (Tutorial): A 20 minute tutorial produced by the American Psychological Association.
APA Tutorials from the Santa Fe College (Gainesville, FL) Library
APA Tutorials from the Suffolk County Community College Library
APA Video Tutorials (from Memorial University of Newfoundland Library. The library's research guide on APA citation style also contains useful information on formatting and citing resources.)
The Purdue Online Writing Lab (OWL) has produced a number of clear, short, YouTube tutorials on How to Cite in APA style. The following video is an example: