APA (7e ed.) Bronvermelding

Catholic Church. Pope (1922-1939 : Pius XI) & Pius XI, P. (1931). On social reconstruction: Encyclical letter. Daughters of St. Paul.

Chicago (17e ed.) Bronvermelding

Catholic Church. Pope (1922-1939 : Pius XI) en Pope Pius XI. On Social Reconstruction: Encyclical Letter. Boston, Mass.: Daughters of St. Paul, 1931.

MLA (8e ed.) Bronvermelding

Catholic Church. Pope (1922-1939 : Pius XI) en Pope Pius XI. On Social Reconstruction: Encyclical Letter. Daughters of St. Paul, 1931.