APA (7th ed.) Citation

John XXIII, P. (1960). Christmas message 1959. National Catholic Welfare Conference.

Chicago Style (17th ed.) Citation

John XXIII, Pope. Christmas Message 1959. Washington, D.C.: National Catholic Welfare Conference, 1960.

MLA (8th ed.) Citation

John XXIII, Pope. Christmas Message 1959. National Catholic Welfare Conference, 1960.

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