APA (7th ed.) Citation

Catholic Church. Pope (1922-1939 : Pius XI). Encyclical letter of Pope Pius XI on atheistic communism. St. Paul Editions.

Chicago Style (17th ed.) Citation

Catholic Church. Pope (1922-1939 : Pius XI). Encyclical Letter of Pope Pius XI on Atheistic Communism. [Boston, MA]: St. Paul Editions.

MLA (8th ed.) Citation

Catholic Church. Pope (1922-1939 : Pius XI). Encyclical Letter of Pope Pius XI on Atheistic Communism. St. Paul Editions.

Warning: These citations may not always be 100% accurate.