APA
Kassam A., Fischer G W Et Al & Van Velthuizen H T. (1993). Agro-ecological land resources assessment for agricaltural ddevelopment planning: Case study of Kenya. Resources database and land productivity. Rome: FAO.
Chicago
Kassam A.H, Fischer G W Et Al and Van Velthuizen H T. 1993. Agro-ecological land resources assessment for agricaltural ddevelopment planning: Case study of Kenya. Resources database and land productivity. Rome: FAO.
Harvard
Kassam A., Fischer G W Et Al and Van Velthuizen H T. (1993). Agro-ecological land resources assessment for agricaltural ddevelopment planning: Case study of Kenya. Resources database and land productivity. Rome: FAO.
MLA
Kassam A.H, Fischer G W Et Al and Van Velthuizen H T. Agro-ecological land resources assessment for agricaltural ddevelopment planning: Case study of Kenya. Resources database and land productivity. Rome: FAO. 1993.