Dyfyniad APA

Rao, P. V. (2006). Principles of environmental science and engineering. Prentice-Hall of India.

Dyfyniad Arddull Chicago

Rao, P. Venugopala. Principles of Environmental Science and Engineering. New Delhi: Prentice-Hall of India, 2006.

Dyfyniad MLA

Rao, P. Venugopala. Principles of Environmental Science and Engineering. Prentice-Hall of India, 2006.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.