APA استشهاد

Onwueme, I. (1978). Tropical tuber crops: Yams cassava sweet potato and cocoyams. John Wiley and Sons.

استشهاد بنمط شيكاغو

Onwueme, I.C. Tropical Tuber Crops: Yams Cassava Sweet Potato and Cocoyams. New York: John Wiley and Sons, 1978.

MLA استشهاد

Onwueme, I.C. Tropical Tuber Crops: Yams Cassava Sweet Potato and Cocoyams. John Wiley and Sons, 1978.