APA (7th ed.) Citation

Gopal, B., & Bhardwaj, N. (1979). Elements of ecology. Vikas Publishing House Pvt. Ltd..

Chicago Style (17th ed.) Citation

Gopal, Brij, and N. Bhardwaj. Elements of Ecology. New Delhi: Vikas Publishing House Pvt. Ltd., 1979.

MLA (9th ed.) Citation

Gopal, Brij, and N. Bhardwaj. Elements of Ecology. Vikas Publishing House Pvt. Ltd., 1979.