Pius XII, P. (1956). The message of Bethlehem and problems of the day: 1955 Christmas message. National Catholic Welfare Conference.
Chicago Style aipamenaPius XII, Pope. The Message of Bethlehem and Problems of the Day: 1955 Christmas Message. Washington, D.C.: National Catholic Welfare Conference, 1956.
MLA aipamenaPius XII, Pope. The Message of Bethlehem and Problems of the Day: 1955 Christmas Message. National Catholic Welfare Conference, 1956.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.