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.
Atenció: Aquestes cites poden no estar 100% correctes.