APA (7th ed.) Citation

John XXIII, P. (1961). 1960 Christmas message. National Catholic Welfare Conference.

Chicago Style (17th ed.) Citation

John XXIII, Pope. 1960 Christmas Message. [Washington, D.C.: National Catholic Welfare Conference, 1961.

MLA (8th ed.) Citation

John XXIII, Pope. 1960 Christmas Message. National Catholic Welfare Conference, 1961.

Warning: These citations may not always be 100% accurate.