Cita APA

Knipscheer, H., Menz, K. M., & Khadr, F. (1980). Benchmark surveys of three crops in Nigeria: Wheat, millet, sorghum. Nigeria: International Institute of Tropical Agriculture.

Citación estilo Chicago

Knipscheer, H.C., Kenneth Milton Menz, y F.H Khadr. Benchmark Surveys of Three Crops in Nigeria: Wheat, Millet, Sorghum. Nigeria: International Institute of Tropical Agriculture, 1980.

Cita MLA

Knipscheer, H.C., Kenneth Milton Menz, y F.H Khadr. Benchmark Surveys of Three Crops in Nigeria: Wheat, Millet, Sorghum. Nigeria: International Institute of Tropical Agriculture, 1980.