APA

Vasishta P. C., . (1991). Textbook of plant ecology. : Vishal Publications, Delhi.

Chicago

Vasishta P C, . 1991. Textbook of plant ecology. : Vishal Publications, Delhi.

Harvard

Vasishta P. C., . (1991). Textbook of plant ecology. : Vishal Publications, Delhi.

MLA

Vasishta P C, . Textbook of plant ecology. : Vishal Publications, Delhi. 1991.