O'Collins, G. (2008). Catholicism: A very short introduction. Oxford University Press.
芝加哥风格引文O'Collins, Gerald. Catholicism: A Very Short Introduction. Oxford ; New York: Oxford University Press, 2008.
MLA引文O'Collins, Gerald. Catholicism: A Very Short Introduction. Oxford University Press, 2008.
警告：这些引文格式不一定是100％准确.