Farming Systems Programme (Botswana) & Norman, D. W. (1994). Farming systems research approach: A primer for eastern and southern Africa. Farming Systems Programme.
Citazione stile Chigago Style (17a edizione)Farming Systems Programme (Botswana) e D. W. Norman. Farming Systems Research Approach: A Primer for Eastern and Southern Africa. Gaborone, Botswana: Farming Systems Programme, 1994.
Citatione MLA (8a ed.)Farming Systems Programme (Botswana) e D. W. Norman. Farming Systems Research Approach: A Primer for Eastern and Southern Africa. Farming Systems Programme, 1994.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.