APA
Punmia B. C., Jain A. K. . & Jain A. K. . (2006). waste water engineering ( Including air pollution). New Delhi: Laxmi publications.
Chicago
Punmia B C, Jain Arun K and Jain Ashok K. 2006. waste water engineering ( Including air pollution). New Delhi: Laxmi publications.
Harvard
Punmia B. C., Jain A. K. . and Jain A. K. . (2006). waste water engineering ( Including air pollution). New Delhi: Laxmi publications.
MLA
Punmia B C, Jain Arun K and Jain Ashok K. waste water engineering ( Including air pollution). New Delhi: Laxmi publications. 2006.