Catholic Church. Pope (1922-1939 : Pius XI). (1935). Forty years after: Reconstructing the social order : Encyclical letter of His Holiness Pope Pius XI. National Catholic Welfare Conference.
Chicago-viite (17. p.)Catholic Church. Pope (1922-1939 : Pius XI). Forty Years After: Reconstructing the Social Order : Encyclical Letter of His Holiness Pope Pius XI. Washington, D.C.: National Catholic Welfare Conference, 1935.
MLA-viite (8. p.)Catholic Church. Pope (1922-1939 : Pius XI). Forty Years After: Reconstructing the Social Order : Encyclical Letter of His Holiness Pope Pius XI. National Catholic Welfare Conference, 1935.
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