KAY, R. W. M. P. A. D. (2020). Farm management. Mc Graw - Hill.
Lua i Stíl Chicago (17ú heag.)KAY, Ronald William M.Edwards Patricia A. Duffy. Farm Management. Mc Graw - Hill, 2020.
Lua MLA (9ú heag.)KAY, Ronald William M.Edwards Patricia A. Duffy. Farm Management. Mc Graw - Hill, 2020.
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