APA Edition Citation

Gupta O P, L. P. S. (1978). Modern weed science: In the tropics and sub-tropics. Today & Tomorrow s printers & Publishers.

Chicago Edition Citation

Gupta O P, Lamba P S. Modern Weed Science: In the Tropics and Sub-tropics. Delhi: Today & Tomorrow s printers & Publishers, 1978.

MLA Edition Citation

Gupta O P, Lamba P S. Modern Weed Science: In the Tropics and Sub-tropics. Today & Tomorrow s printers & Publishers, 1978.