Farming Systems Programme (Botswana) & Norman, D. W. (1994). Farming systems research approach: A primer for eastern and southern Africa. Farming Systems Programme.
芝加哥风格引文Farming Systems Programme (Botswana) 与 D. W. Norman. Farming Systems Research Approach: A Primer for Eastern and Southern Africa. Gaborone, Botswana: Farming Systems Programme, 1994.
MLA引文Farming Systems Programme (Botswana) 与 D. W. Norman. Farming Systems Research Approach: A Primer for Eastern and Southern Africa. Farming Systems Programme, 1994.
警告：这些引文格式不一定是100％准确.