International Institute of Tropical Agriculture & Mutsaers, H. J. W. (1997). A field guide for on-farm experimentation. International Institute of Tropical Agriculture.
Dyfyniad Arddull ChicagoInternational Institute of Tropical Agriculture and H. J. W. Mutsaers. A Field Guide for On-farm Experimentation. Ibadan, Nigeria: International Institute of Tropical Agriculture, 1997.
Dyfyniad MLAInternational Institute of Tropical Agriculture and H. J. W. Mutsaers. A Field Guide for On-farm Experimentation. International Institute of Tropical Agriculture, 1997.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.