APA (7th ed.) Citation

Pius XII, P. (1940). Address of Pope Pius XII: To the Sacred College of Cardinals on Christmas Eve, 1939. Catholic Truth Society.

Chicago Style (17th ed.) Citation

Pius XII, Pope. Address of Pope Pius XII: To the Sacred College of Cardinals on Christmas Eve, 1939. London: Catholic Truth Society, 1940.

MLA (8th ed.) Citation

Pius XII, Pope. Address of Pope Pius XII: To the Sacred College of Cardinals on Christmas Eve, 1939. Catholic Truth Society, 1940.