APA (7th ed.) Citation

D'Arcy, M. C. (1956). Communism and Christianity. Penguin Books.

Chicago Style (17th ed.) Citation

D'Arcy, Martin C. Communism and Christianity. U.S.A: Penguin Books, 1956.

MLA (9th ed.) Citation

D'Arcy, Martin C. Communism and Christianity. Penguin Books, 1956.