Kay, R. D., Duffy, P., & Edwards, W. M. (2004). Farm management (5th ed.). Boston: McGraw-Hill.
Trích dẫn kiểu ChicagoKay, Ronald D., Patricia Duffy, và William M. Edwards. Farm Management. 5th ed. Boston: McGraw-Hill, 2004.
Deismireacht MLAKay, Ronald D., Patricia Duffy, và William M. Edwards. Farm Management. 5th ed. Boston: McGraw-Hill, 2004.
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