Παραπομπή σε μορφή APA (7η εκδ.)

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.

Παραπομπή σε μορφή Chicago (17η εκδ.)

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

Παραπομπή σε μορφή MLA (8th εκδ.)

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