APA Edition Citation

Verma, P. S., & Agarwal, V. K. (2007). 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., 2007.

MLA Edition Citation

Verma, P. S., and V. K. Agarwal. Environmental Biology: Principles of Ecology. S Chand & Co., 2007.