Catholic Church. Pope (1939-1958 : Pius XII). (1950). Humani generis: Encyclical letter of Pope Pius XII concerning some false opinions which treaten to undermine the foundations of Catholic doctrine. National Catholic Welfare Conference.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Catholic Church. Pope (1939-1958 : Pius XII). Humani Generis: Encyclical Letter of Pope Pius XII Concerning Some False Opinions Which Treaten to Undermine the Foundations of Catholic Doctrine. Washington, D.C.: National Catholic Welfare Conference, 1950.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Catholic Church. Pope (1939-1958 : Pius XII). Humani Generis: Encyclical Letter of Pope Pius XII Concerning Some False Opinions Which Treaten to Undermine the Foundations of Catholic Doctrine. National Catholic Welfare Conference, 1950.