Παραπομπή APA

Gupta,O P. (1987). Aquatic weed management: A text book and manual. Today and Tomarrows Printers and Publishers.

Παραπομπή Chicago Style

Gupta,O P. Aquatic Weed Management: A Text Book and Manual. New Delhi: Today and Tomarrows Printers and Publishers, 1987.

Παραπομπή MLA

Gupta,O P. Aquatic Weed Management: A Text Book and Manual. Today and Tomarrows Printers and Publishers, 1987.