The following books were recommended on your syllabus by Dr. Dunnum as good sources on rhetoric.
A New History of Classical Rhetoric by 
OneSearch is a great place to start your research, as it combines most of the library's books, journal articles, and digital resources into a single search. Search OneSearch from the library website.
Campbell University subscribes to the following journals that may be useful for your research. Remember that if you are looking at these journals from off campus that you will need to log in using your Blackboard username and password.
Get Materials from Campbell Libraries
Request Materials from Wiggins Library to:
Get Materials Campbell Doesn't Have
OneSearch Basics