Catholic Church. Pope & Treacy, G. C. (1939). Five great encyclicals: Labor, education, marriage, reconstructing the social order, atheistic communism, with discussion club outlines. Paulist Press.
Chicago-referens (17:e uppl.)Catholic Church. Pope och Gerald Carr Treacy. Five Great Encyclicals: Labor, Education, Marriage, Reconstructing the Social Order, Atheistic Communism, with Discussion Club Outlines. New York: Paulist Press, 1939.
MLA-referens (9:e uppl.)Catholic Church. Pope och Gerald Carr Treacy. Five Great Encyclicals: Labor, Education, Marriage, Reconstructing the Social Order, Atheistic Communism, with Discussion Club Outlines. Paulist Press, 1939.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.