Kay, R. D., & Edward, W. M. (2000). Farm Management (3rd Ed.). S. chand & Company LTD..
Lua i Stíl Chicago (17ú heag.)Kay, Ronald D., agus William M. Edward. Farm Management. 3rd Ed. New Delhi: S. chand & Company LTD., 2000.
Lua MLA (9ú heag.)Kay, Ronald D., agus William M. Edward. Farm Management. 3rd Ed. S. chand & Company LTD., 2000.
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