Cita APA (7a ed.)
Okigbo, B. (1978). Grain legumes in the agriculture of the tropics.
Cita Chicago Style (17a ed.)
Okigbo, B. Grain Legumes in the Agriculture of the Tropics. 1978.
Cita MLA (9a ed.)
Okigbo, B. Grain Legumes in the Agriculture of the Tropics. 1978.
Precaución: Estas citas no son 100% exactas.