APA引用形式

Asthana, D. K., & Asthana, M. (2006). Textbook of environmental studies. S Chand & Co Ltd.

シカゴスタイル引用形

Asthana, D. K., , Meera Asthana. Textbook of Environmental Studies. New Delhi: S Chand & Co Ltd, 2006.

MLA引用形式

Asthana, D. K., , Meera Asthana. Textbook of Environmental Studies. S Chand & Co Ltd, 2006.