APA aipamena

Deswal, A., & Deswal, S. (2005). Basic course in Environmental studies.

Chicago Style aipamena

Deswal, A., and S. Deswal. Basic Course in Environmental Studies. Delhi, Dhanpat Rai & Co, 2005.

MLA aipamena

Deswal, A., and S. Deswal. Basic Course in Environmental Studies. 2005.