Cita APA (7th ed.)
Barna, G. (1991). User friendly churches: What Christians need to know about the church. Regals Books.
Cita Chicago (17th ed.)
Barna, George. User Friendly Churches: What Christians Need to Know About the Church. California: Regals Books, 1991.
Cita MLA (9th ed.)
Barna, George. User Friendly Churches: What Christians Need to Know About the Church. Regals Books, 1991.
Atenció: Aquestes cites poden no estar 100% correctes.