Pius XII, P. (1951). To all who are in prison: A message. National Catholic Welfare Conference.
Chicago-referens (17:e uppl.)Pius XII, Pope. To All Who Are in Prison: A Message. Washington, D.C.: National Catholic Welfare Conference, 1951.
MLA-referens (8:e uppl.)Pius XII, Pope. To All Who Are in Prison: A Message. National Catholic Welfare Conference, 1951.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.