Cita APA (7th ed.)

O'Collins, G. (2008). Catholicism: A very short introduction. Oxford University Press.

Cita Chicago (17th ed.)

O'Collins, Gerald. Catholicism: A Very Short Introduction. Oxford ; New York: Oxford University Press, 2008.

Cita MLA (9th ed.)

O'Collins, Gerald. Catholicism: A Very Short Introduction. Oxford University Press, 2008.