Here are links to some sites that will help you to use APA Style:
SFU APA Style Guide
from Simon Fraser University Library. This guide is more extensive than most on the net.
Citing Sources According to APA Style
A basic guide to APA Style based on the APA 6th Edition Style Guide by Robert Thomas. This guide covers all the basics.
Several copies of the full print manual are also available in the Reference section of the Library (Main Floor). The call number is BF 76.7 P83 2010.