Cita APA (7a ed.)

Pius XII, P. (1956). The message of Bethlehem and problems of the day: 1955 Christmas message .. National Catholic Welfare Conference.

Cita Chicago Style (17a ed.)

Pius XII, Pope. The Message of Bethlehem and Problems of the Day: 1955 Christmas Message .. Washington: National Catholic Welfare Conference, 1956.

Cita MLA (8a ed.)

Pius XII, Pope. The Message of Bethlehem and Problems of the Day: 1955 Christmas Message .. National Catholic Welfare Conference, 1956.