Pius, P. C. C. P. (1939). Quadragesimo anno, encyclical letter of Pope Pius XI on constructing the social order, with discussion club outline. New York.
Chicago Style (17th ed.) CitationPius, Pope; Catholic Church. Pope. Quadragesimo Anno, Encyclical Letter of Pope Pius XI on Constructing the Social Order, with Discussion Club Outline. New York, 1939.
MLA (8th ed.) CitationPius, Pope; Catholic Church. Pope. Quadragesimo Anno, Encyclical Letter of Pope Pius XI on Constructing the Social Order, with Discussion Club Outline. New York, 1939.
Warning: These citations may not always be 100% accurate.