APA (7th ed.) Citation

Pius XII, P. (1952). 1951 Christmas message of Pope Pius XII: The heart of world peace lies in spiritual order. National Catholic Welfare Conference.

Chicago Style (17th ed.) Citation

Pius XII, Pope. 1951 Christmas Message of Pope Pius XII: The Heart of World Peace Lies in Spiritual Order. Washington, D.C.: National Catholic Welfare Conference, 1952.

MLA (8th ed.) Citation

Pius XII, Pope. 1951 Christmas Message of Pope Pius XII: The Heart of World Peace Lies in Spiritual Order. National Catholic Welfare Conference, 1952.