APA (7th ed.) Citation

Catholic Church. Pope (1939-1958 : Pius XII) & Pius XII, P. (1980). Encyclical letter of Pope Pius XII on the Sacred Liturgy: Mediator Dei. St. Paul Editions.

Chicago Style (17th ed.) Citation

Catholic Church. Pope (1939-1958 : Pius XII) and Pope Pius XII. Encyclical Letter of Pope Pius XII on the Sacred Liturgy: Mediator Dei. [Boston]: St. Paul Editions, 1980.

MLA (8th ed.) Citation

Catholic Church. Pope (1939-1958 : Pius XII) and Pope Pius XII. Encyclical Letter of Pope Pius XII on the Sacred Liturgy: Mediator Dei. St. Paul Editions, 1980.