APA-referens (7:e uppl.)

Catholic Church. Pope (1922-1939 : Pius XI) & National Catholic Welfare Conference. (1942). Quadragesimo anno: Encyclical letter on reconstructing the social order. National Catholic Welfare Conference.

Chicago-referens (17:e uppl.)

Catholic Church. Pope (1922-1939 : Pius XI) och National Catholic Welfare Conference. Quadragesimo Anno: Encyclical Letter on Reconstructing the Social Order. Washington, D.C.: National Catholic Welfare Conference, 1942.

MLA-referens (8:e uppl.)

Catholic Church. Pope (1922-1939 : Pius XI) och National Catholic Welfare Conference. Quadragesimo Anno: Encyclical Letter on Reconstructing the Social Order. National Catholic Welfare Conference, 1942.