APA-ийн эшлэл(7 дахь хэвлэлт)

Gupta, O. (1998). Modern weed management: With special reference to agriculture in the tropics ... Botanica.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Gupta, O.P. Modern Weed Management: With Special Reference to Agriculture in the Tropics ... New Delhi: Botanica, 1998.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Gupta, O.P. Modern Weed Management: With Special Reference to Agriculture in the Tropics ... Botanica, 1998.