Upton, M. (1973). Farm management in Africa: The principles of production and planning. Oxford.
Chicago-viite (17. p.)Upton, Martin. Farm Management in Africa: The Principles of Production and Planning. London: Oxford, 1973.
MLA-viite (9. p.)Upton, Martin. Farm Management in Africa: The Principles of Production and Planning. Oxford, 1973.
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