Caldwell, J. C. (1975). The Sahelian drought and its demographic implications. Overseas Liaison Committee, American Council on Education.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Caldwell, John C. The Sahelian Drought and Its Demographic Implications. [Washington]: Overseas Liaison Committee, American Council on Education, 1975.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Caldwell, John C. The Sahelian Drought and Its Demographic Implications. Overseas Liaison Committee, American Council on Education, 1975.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.