APA (7th ed.) Citation

Catholic Church. Pope (1922-1939 : Pius XI). (1941). On Christian marriage. Paulist Press.

Chicago Style (17th ed.) Citation

Catholic Church. Pope (1922-1939 : Pius XI). On Christian Marriage. Glen Rock, N.J.: Paulist Press, 1941.

MLA (9th ed.) Citation

Catholic Church. Pope (1922-1939 : Pius XI). On Christian Marriage. Paulist Press, 1941.

Warning: These citations may not always be 100% accurate.