Treacy, G. C. (1939). Five Great Encyclicals. Labor - education - marriage - reconstructing the social order - atheistic communism. New York.
Chicago-referens (17:e uppl.)Treacy, Gerald C. Five Great Encyclicals. Labor - Education - Marriage - Reconstructing the Social Order - Atheistic Communism. New York, 1939.
MLA-referens (8:e uppl.)Treacy, Gerald C. Five Great Encyclicals. Labor - Education - Marriage - Reconstructing the Social Order - Atheistic Communism. New York, 1939.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.