Farming Systems Programme (Botswana) & Norman, D. W. (1994). Farming systems research approach: A primer for eastern and southern Africa. Farming Systems Programme.
Цитирование в стиле Чикаго (17-е изд.)Farming Systems Programme (Botswana) и D. W. Norman. Farming Systems Research Approach: A Primer for Eastern and Southern Africa. Gaborone, Botswana: Farming Systems Programme, 1994.
Цитирование MLA (8-е изд.)Farming Systems Programme (Botswana) и D. W. Norman. Farming Systems Research Approach: A Primer for Eastern and Southern Africa. Farming Systems Programme, 1994.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.