Cita APA

Brij Gopal; Bhardwaj, N. (1979). Elements of ecology.

Chicago Edition Citation

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

Cita MLA

Brij Gopal; Bhardwaj, N. Elements of Ecology. 1979.