APA (7e ed.) Bronvermelding

Pius, P. C. C. P. (1932). Encyclical Letter of His Holiness, Pope Pius XI. Washington, D.C..

Chicago (17e ed.) Bronvermelding

Pius, Pope; Catholic Church. Pope. Encyclical Letter of His Holiness, Pope Pius XI. Washington, D.C., 1932.

MLA (8e ed.) Bronvermelding

Pius, Pope; Catholic Church. Pope. Encyclical Letter of His Holiness, Pope Pius XI. Washington, D.C., 1932.

Let op: Deze citaties zijn niet altijd 100% accuraat.