Kay, R. D., Edwards, W. M., & Duffy, P. A. (2020). Farm management (Ninth edition.). McGraw-Hill Higher Education.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रKay, Ronald D., William M. Edwards, और Patricia Ann Duffy. Farm Management. Ninth edition. New York: McGraw-Hill Higher Education, 2020.
एमएलए (8वां संस्करण) प्रशस्ति पत्रKay, Ronald D., et al. Farm Management. Ninth edition. McGraw-Hill Higher Education, 2020.
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