Cooley, W. D. (1966). The Negroland of the Arabs examined and explained; or, An inquiry into the early history and geography of Central Africa (Second edition.). Barnes & Noble.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Cooley, William Desborough. The Negroland of the Arabs Examined and Explained; or, An Inquiry into the Early History and Geography of Central Africa. Second edition. New York: Barnes & Noble, 1966.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Cooley, William Desborough. The Negroland of the Arabs Examined and Explained; or, An Inquiry into the Early History and Geography of Central Africa. Second edition. Barnes & Noble, 1966.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.