Wilkinson, J. W. (1909). Practical agriculture: A brief treatise on agriculture, horticulture, forestry, stock feeding, animal husbandry, and road building. American Book Company.
Chicago-referens (17:e uppl.)Wilkinson, John W. Practical Agriculture: A Brief Treatise on Agriculture, Horticulture, Forestry, Stock Feeding, Animal Husbandry, and Road Building. New York: American Book Company, 1909.
MLA-referens (8:e uppl.)Wilkinson, John W. Practical Agriculture: A Brief Treatise on Agriculture, Horticulture, Forestry, Stock Feeding, Animal Husbandry, and Road Building. American Book Company, 1909.
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