APA (7th ed.) Citation

Irvine, F. R., & Ahn, P. M. (1974). West African crops. Oxford University Press.

Chicago Style (17th ed.) Citation

Irvine, Frederick Robert, and Peter M. Ahn. West African Crops. London: Oxford University Press, 1974.

MLA (9th ed.) Citation

Irvine, Frederick Robert, and Peter M. Ahn. West African Crops. Oxford University Press, 1974.