Iowa State University. Center for Agricultural and Economic Development. (1965). Economic development of agriculture: The modernization of farming ([1st ed.].). Iowa State University Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Iowa State University. Center for Agricultural and Economic Development. Economic Development of Agriculture: The Modernization of Farming. [1st ed.]. Ames: Iowa State University Press, 1965.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Iowa State University. Center for Agricultural and Economic Development. Economic Development of Agriculture: The Modernization of Farming. [1st ed.]. Iowa State University Press, 1965.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.