Pius, P. C. C. P. (1936). The Catholic Priesthood, Encyclical Letter of His Holiness, Pope Pius XI. Washington, D.C..
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Pius, Pope; Catholic Church. Pope. The Catholic Priesthood, Encyclical Letter of His Holiness, Pope Pius XI. Washington, D.C., 1936.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Pius, Pope; Catholic Church. Pope. The Catholic Priesthood, Encyclical Letter of His Holiness, Pope Pius XI. Washington, D.C., 1936.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.