APA-referens (7:e uppl.)

Onwueme, I. C., & Charles, W. B. (1994). Tropical root and tuber crops: Production, perspectives and future prospects. FAO of the United Nations.

Chicago-referens (17:e uppl.)

Onwueme, I. C., och Winston B. Charles. Tropical Root and Tuber Crops: Production, Perspectives and Future Prospects. Rome: FAO of the United Nations, 1994.

MLA-referens (9:e uppl.)

Onwueme, I. C., och Winston B. Charles. Tropical Root and Tuber Crops: Production, Perspectives and Future Prospects. FAO of the United Nations, 1994.