Παραπομπή σε μορφή APA (7η εκδ.)

Farming Systems Programme (Botswana) & Norman, D. W. (1994). Farming systems research approach: A primer for eastern and southern Africa. Farming Systems Programme.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Farming Systems Programme (Botswana) και D. W. Norman. Farming Systems Research Approach: A Primer for Eastern and Southern Africa. Gaborone, Botswana: Farming Systems Programme, 1994.

Παραπομπή σε μορφή MLA (8th εκδ.)

Farming Systems Programme (Botswana) και D. W. Norman. Farming Systems Research Approach: A Primer for Eastern and Southern Africa. Farming Systems Programme, 1994.