Cita APA (7a ed.)

Catholic Church. Pope (1922-1939 : Pius XI) & Treacy, G. C. Atheistic communism: Encyclical letter of His Holiness Pope Pius XI (with discussion club outline). Paulist Press.

Cita Chicago Style (17a ed.)

Catholic Church. Pope (1922-1939 : Pius XI) y Gerald C. Treacy. Atheistic Communism: Encyclical Letter of His Holiness Pope Pius XI (with Discussion Club Outline). New York: Paulist Press.

Cita MLA (8a ed.)

Catholic Church. Pope (1922-1939 : Pius XI) y Gerald C. Treacy. Atheistic Communism: Encyclical Letter of His Holiness Pope Pius XI (with Discussion Club Outline). Paulist Press.