Books
For more information on citing books in APA style on your references page, visithttp://owl.english.purdue.edu/owl/resource/560/08.
Two Authors
Warren, J. T., & Fassett, D. L. (2011). Communication: A critical/cultural introduction. Los Angeles, CA: Sage.
Chapter from Edited Book
Mumby, D. K. (2011). Power and ethics. In G. Cheney, S. May, & D. Munshi (Eds.), The handbook of communication ethics (pp. 84–98). New York, NY: Routledge.