GUPTA, O. P. (1998). MODERN WEED MANAGEMENT: WITH SPECIAL REFERENCE TO AGRICULTURE IN THE TROPICS AND SUBTROPICS.
Chicago Style aipamenaGUPTA, O P. MODERN WEED MANAGEMENT: WITH SPECIAL REFERENCE TO AGRICULTURE IN THE TROPICS AND SUBTROPICS. BIKANER, AGRO BOTANICA, 1998.
MLA aipamenaGUPTA, O P. MODERN WEED MANAGEMENT: WITH SPECIAL REFERENCE TO AGRICULTURE IN THE TROPICS AND SUBTROPICS. 1998.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.