APA Edition Citation

Verma, P. S., & Agarwal , V. K. (1983). Environmental biology: Principles of ecology. S Chand & Co..

Chicago Edition Citation

Verma, P. S., and V. K. Agarwal. Environmental Biology: Principles of Ecology. New Delhi: S Chand & Co., 1983.

MLA Edition Citation

Verma, P. S., and V. K. Agarwal. Environmental Biology: Principles of Ecology. S Chand & Co., 1983.