VENUGOPAL PINGALI. (2004). STATE OFTHE INDIAN FARMER: INPUT MANAGEMENT,VOL.8. ACADEMIC FOUNDATION.
Čikaški stil citiranja (17. izdanje)VENUGOPAL PINGALI. STATE OFTHE INDIAN FARMER: INPUT MANAGEMENT,VOL.8. NEW DELHI: ACADEMIC FOUNDATION, 2004.
MLA način citiranja (9. izdanje)VENUGOPAL PINGALI. STATE OFTHE INDIAN FARMER: INPUT MANAGEMENT,VOL.8. ACADEMIC FOUNDATION, 2004.
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