Niebuhr, R. (1965). Man's nature and his communities: Essays on the dynamics and enigmas of man's personal and social existence. Scriber.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Niebuhr, Reinhold. Man's Nature and His Communities: Essays on the Dynamics and Enigmas of Man's Personal and Social Existence. New York: Scriber, 1965.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Niebuhr, Reinhold. Man's Nature and His Communities: Essays on the Dynamics and Enigmas of Man's Personal and Social Existence. Scriber, 1965.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.