APA (7th ed.) Citation

Catholic Church. Pope (1939-1958 : Pius XII) & Pius XII, P. (1939). Summi pontificatus: Encyclical letter of Pope Pius XII on the function of the state in the modern world. National Catholic welfare conference.

Chicago Style (17th ed.) Citation

Catholic Church. Pope (1939-1958 : Pius XII) and Pope Pius XII. Summi Pontificatus: Encyclical Letter of Pope Pius XII on the Function of the State in the Modern World. Washington, D.C. :: National Catholic welfare conference, 1939.

MLA (8th ed.) Citation

Catholic Church. Pope (1939-1958 : Pius XII) and Pope Pius XII. Summi Pontificatus: Encyclical Letter of Pope Pius XII on the Function of the State in the Modern World. National Catholic welfare conference, 1939.