Catholic Church. Pope (1922-1939 : Pius XI). (1937). The Church in Germany. National Catholic Welfare Conference.
Chicago-referens (17:e uppl.)Catholic Church. Pope (1922-1939 : Pius XI). The Church in Germany. Washington, D.C.: National Catholic Welfare Conference, 1937.
MLA-referens (8:e uppl.)Catholic Church. Pope (1922-1939 : Pius XI). The Church in Germany. National Catholic Welfare Conference, 1937.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.