APA (7th ed.) Zitazioa
Godfrey-Sam-Aggrey, W. (1977). Cassava (Manihot esculenta) fertilizer and nutritional studies in Sierra Leone, West Africa.
Chicago Style (17th ed.) Zitazioa
Godfrey-Sam-Aggrey, Wilhelm. Cassava (Manihot Esculenta) Fertilizer and Nutritional Studies in Sierra Leone, West Africa. Göttingen, 1977.
MLA (9th ed.) Zitazioa
Godfrey-Sam-Aggrey, Wilhelm. Cassava (Manihot Esculenta) Fertilizer and Nutritional Studies in Sierra Leone, West Africa. 1977.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.