APA (7th ed.) Citation

Ahn, P. M., & Irvine, F. R. (1970). West African agriculture (3d ed.). Oxford U.P..

Chicago Style (17th ed.) Citation

Ahn, Peter M., and Frederick Robert Irvine. West African Agriculture. 3d ed. London: Oxford U.P., 1970.

MLA (9th ed.) Citation

Ahn, Peter M., and Frederick Robert Irvine. West African Agriculture. 3d ed. Oxford U.P., 1970.