Gaya APA
Birdi, G. (1979).
Water supply and sanitary engineering (public health engineering) (2nd ed.).
Nai Sarak, Delhi:
Dhanpat Rai & Sons.
Gaya MLA
Birdi, G.S..
"Water supply and sanitary engineering (public health engineering)".
2nd ed.
Nai Sarak, Delhi:
Dhanpat Rai & Sons,
1979.
Text.