Wilkinson, J. W. (1909). Practical agriculture: A brief treatise on agriculture, horticulture, forestry, stock feeding, animal husbandry, and road building. American Book Company.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)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.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Wilkinson, John W. Practical Agriculture: A Brief Treatise on Agriculture, Horticulture, Forestry, Stock Feeding, Animal Husbandry, and Road Building. American Book Company, 1909.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.