Lua APA (7ú heag.)
Barna, G. (1991). What Americans believe: An annual survey of values and religious views in the United States. Regal Books.
Lua i Stíl Chicago (17ú heag.)
Barna, George. What Americans Believe: An Annual Survey of Values and Religious Views in the United States. California: Regal Books, 1991.
Lua MLA (9ú heag.)
Barna, George. What Americans Believe: An Annual Survey of Values and Religious Views in the United States. Regal Books, 1991.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.