APA (7th ed.) Citation

Pius XI, P. (1937). Atheistic communism: Encyclical letter of His Holiness Pope Pius XI ; with discussion club outline by Gerald C. Tracy. New York.

Chicago Style (17th ed.) Citation

Pius XI, Pope. Atheistic Communism: Encyclical Letter of His Holiness Pope Pius XI ; with Discussion Club Outline by Gerald C. Tracy. New York, 1937.

MLA (8th ed.) Citation

Pius XI, Pope. Atheistic Communism: Encyclical Letter of His Holiness Pope Pius XI ; with Discussion Club Outline by Gerald C. Tracy. New York, 1937.

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