Παραπομπή APA

Asthana, D. K. (2005). Environment: Problems and solutions (2nd ed.). S. Chand & Co.

Παραπομπή Chicago Style

Asthana, D. K. Environment: Problems and Solutions. 2nd ed. New Delhi: S. Chand & Co, 2005.

Παραπομπή MLA

Asthana, D. K. Environment: Problems and Solutions. 2nd ed. S. Chand & Co, 2005.