APA استشهاد

Chopra, A. K., & Khanna, D. R. (2013). Environmental Pollution Assessment and Control Techniques.

استشهاد بنمط شيكاغو

Chopra, A K., و D R. Khanna. Environmental Pollution Assessment and Control Techniques. Delhi, Biotech Books, 2013.

MLA استشهاد

Chopra, A K., و D R. Khanna. Environmental Pollution Assessment and Control Techniques. 2013.