Gupta, O. (1998). Modern weed management: With special reference to agriculture in the tropics ... Botanica.
Citazione stile Chigago Style (17a edizione)Gupta, O.P. Modern Weed Management: With Special Reference to Agriculture in the Tropics ... New Delhi: Botanica, 1998.
Citatione MLA (9a ed.)Gupta, O.P. Modern Weed Management: With Special Reference to Agriculture in the Tropics ... Botanica, 1998.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.