Greeley, A. M. (1982). Religion: A secular theory. The Free Press.
Lua i Stíl Chicago (17ú heag.)Greeley, Andrew M. Religion: A Secular Theory. The Free Press, 1982.
Lua MLA (9ú heag.)Greeley, Andrew M. Religion: A Secular Theory. The Free Press, 1982.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.