Cita APA (7a ed.)

Ahaus, H. (1932). Pope Pius XI and Foreign Missions. New York.

Cita Chicago Style (17a ed.)

Ahaus, H. Pope Pius XI and Foreign Missions. New York, 1932.

Cita MLA (8a ed.)

Ahaus, H. Pope Pius XI and Foreign Missions. New York, 1932.

Precaución: Estas citas no son 100% exactas.