Kay, R. D., Duffy, P., & Edwards, W. M. (2004). Farm management (5th ed.). Boston: McGraw-Hill.
Chicago Style aipamenaKay, Ronald D., Patricia Duffy, và William M. Edwards. Farm Management. 5th ed. Boston: McGraw-Hill, 2004.
MLA aipamenaKay, Ronald D., Patricia Duffy, và William M. Edwards. Farm Management. 5th ed. Boston: McGraw-Hill, 2004.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.