APA (7th ed.) Citation

Catholic Church. Pope (1922-1939 : Pius XI) & Pius XI, P. (1955). Reconstructing the social order: Encyclical letter Quadragesimo anno. Australian Catholic Truth Society.

Chicago Style (17th ed.) Citation

Catholic Church. Pope (1922-1939 : Pius XI) and Pope Pius XI. Reconstructing the Social Order: Encyclical Letter Quadragesimo Anno. Melbourne: Australian Catholic Truth Society, 1955.

MLA (8th ed.) Citation

Catholic Church. Pope (1922-1939 : Pius XI) and Pope Pius XI. Reconstructing the Social Order: Encyclical Letter Quadragesimo Anno. Australian Catholic Truth Society, 1955.

Warning: These citations may not always be 100% accurate.