Catholic Church. Pope (1922-1939 : Pius XI). (1937). The Church in Germany. National Catholic Welfare Conference.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCatholic Church. Pope (1922-1939 : Pius XI). The Church in Germany. Washington, D.C.: National Catholic Welfare Conference, 1937.
एमएलए (8वां संस्करण) प्रशस्ति पत्रCatholic Church. Pope (1922-1939 : Pius XI). The Church in Germany. National Catholic Welfare Conference, 1937.
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