Gupta, O. (1998). Modern weed management: With special reference to agriculture in the tropics ... Botanica.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGupta, O.P. Modern Weed Management: With Special Reference to Agriculture in the Tropics ... New Delhi: Botanica, 1998.
एमएलए (9वां संस्करण) प्रशस्ति पत्रGupta, O.P. Modern Weed Management: With Special Reference to Agriculture in the Tropics ... Botanica, 1998.
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