APA (7th ed.) Citation

Catholic Church. Pope (1922-1939 : Pius XI), National Catholic Welfare Conference, & Kelp, R. (1955). Sixteen encyclicals of His Holiness Pope Pius XI, 1926-1937. National Catholic Welfare Conference.

Chicago Style (17th ed.) Citation

Catholic Church. Pope (1922-1939 : Pius XI), National Catholic Welfare Conference, and Rosabelle Kelp. Sixteen Encyclicals of His Holiness Pope Pius XI, 1926-1937. Washington: National Catholic Welfare Conference, 1955.

MLA (8th ed.) Citation

Catholic Church. Pope (1922-1939 : Pius XI), et al. Sixteen Encyclicals of His Holiness Pope Pius XI, 1926-1937. National Catholic Welfare Conference, 1955.