Try searching the library catalog for "Nonprofit organizations -- Marketing", limit your search to the Subject Heading field on the right.
Successful Marketing Strategies for Nonprofit Organizations by 
The Nonprofit Marketing Guide by 
Faith-Based Marketing: the guide to reaching 140 million Christian consumers by 
Belief Systems, Religion, and Behavioral Economics Marketing in Multicultural Environments by 
Got Religion?: how churches, mosques, and synagogues can bring young people back by 
Digital Religion: understanding religious practice in new media worlds by 
