Cita APA (7a ed.)
Okigbo, B. (1978). Weed problems and food production in developing countries.
Cita Chicago Style (17a ed.)
Okigbo, B.D.N. Weed Problems and Food Production in Developing Countries. 1978.
Cita MLA (9a ed.)
Okigbo, B.D.N. Weed Problems and Food Production in Developing Countries. 1978.
Precaución: Estas citas no son 100% exactas.