APA (7th ed.) Citation
Barna, G. (1991). User friendly churches: What Christians need to know about the churches people love to go to. Regal Books.
Chicago Style (17th ed.) Citation
Barna, George. User Friendly Churches: What Christians Need to Know About the Churches People Love to Go to. Ventura: Regal Books, 1991.
MLA (9th ed.) Citation
Barna, George. User Friendly Churches: What Christians Need to Know About the Churches People Love to Go to. Regal Books, 1991.
Warning: These citations may not always be 100% accurate.