There are a number of citation resources.
Please take a look at the APA LibGuides for assistance. URL: http://wiu.libguides.com/APA.
There are also copies of the APA Manual 6th ed. behind the Reference Desk.There are also two excellent APA sources online
Online Writing Lab at Purdue
Excelsior Online Writing Lab
And don't forget to check out the WIU University Writing Center located in Malpass Library 3rd floor.