Παραπομπή APA

Krishna, G., & Anilkumar, A. (2003). River pollution in india and its management. APH Publishing Corporation.

Παραπομπή Chicago Style

Krishna, Gopal, και Agarwal Anilkumar. River Pollution in India and Its Management. New Delhi: APH Publishing Corporation, 2003.

Παραπομπή MLA

Krishna, Gopal, και Agarwal Anilkumar. River Pollution in India and Its Management. APH Publishing Corporation, 2003.