APA Citation

Asthana, D., & Asthana, M. (2012). A textbook of environmental studies (2nd ed.). Kolkata: S. Chand.

Chicago Style Citation

Asthana, D.K., and Meera Asthana. A Textbook of Environmental Studies. 2nd ed. Kolkata: S. Chand, 2012.

MLA Citation

Asthana, D.K., and Meera Asthana. A Textbook of Environmental Studies. 2nd ed. Kolkata: S. Chand, 2012.

Warning: These citations may not always be 100% accurate.