Hassan, F. A. (2002). Droughts, food, and culture: Ecological change and food security in Africa's later prehistory. New York: Kluwer Academic/Plenum Publishers.
استشهاد بنمط شيكاغوHassan, Fekri A.. Droughts, Food, and Culture: Ecological Change and Food Security in Africa's Later Prehistory. New York: Kluwer Academic/Plenum Publishers, 2002.
MLA استشهادHassan, Fekri A.. Droughts, Food, and Culture: Ecological Change and Food Security in Africa's Later Prehistory. New York: Kluwer Academic/Plenum Publishers, 2002.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.