Leo XIII, P. (1936). On the condition of the working classes (Rerum novarum): Encyclical of His Holiness Pope Leo XIII : arranged for study clubs, with questions and references. New York.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Leo XIII, Pope. On the Condition of the Working Classes (Rerum Novarum): Encyclical of His Holiness Pope Leo XIII : Arranged for Study Clubs, with Questions and References. New York, 1936.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Leo XIII, Pope. On the Condition of the Working Classes (Rerum Novarum): Encyclical of His Holiness Pope Leo XIII : Arranged for Study Clubs, with Questions and References. New York, 1936.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.