APA

Singh D. B., Kumar D. R. & Singh D. M. (2012). Water pollution and environment. New Delhi: Enkay publishing house.

Chicago

Singh Dr B.S, Kumar Dr Ranveer and Singh Dr M.R. 2012. Water pollution and environment. New Delhi: Enkay publishing house.

Harvard

Singh D. B., Kumar D. R. and Singh D. M. (2012). Water pollution and environment. New Delhi: Enkay publishing house.

MLA

Singh Dr B.S, Kumar Dr Ranveer and Singh Dr M.R. Water pollution and environment. New Delhi: Enkay publishing house. 2012.