APA (7th ed.) Citation

Asthana, D. K., & Asthana, M. (1998). Environment: Problems and Solutions. S. Chand & Company Ltd..

Chicago Style (17th ed.) Citation

Asthana, D. K., and Meera Asthana. Environment: Problems and Solutions. New Delhi: S. Chand & Company Ltd., 1998.

MLA (9th ed.) Citation

Asthana, D. K., and Meera Asthana. Environment: Problems and Solutions. S. Chand & Company Ltd., 1998.