APA

Rao V., . (2005). Textbook of Environmental Engineering. new delhi: Prentice Hall of india private lim.

Chicago

Rao Venugopala, . 2005. Textbook of Environmental Engineering. new delhi: Prentice Hall of india private lim.

Harvard

Rao V., . (2005). Textbook of Environmental Engineering. new delhi: Prentice Hall of india private lim.

MLA

Rao Venugopala, . Textbook of Environmental Engineering. new delhi: Prentice Hall of india private lim. 2005.