Παραπομπή σε μορφή APA (7η εκδ.)

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

Παραπομπή σε μορφή Chicago (17η εκδ.)

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

Παραπομπή σε μορφή MLA (9th εκδ.)

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