Dyfyniad APA

Hammer, M. J., & Viessman, W. (1985). Water supply and pollution control (Ed.4.).

Dyfyniad Arddull Chicago

Hammer, Mark J., and Warren Viessman. Water Supply and Pollution Control. Ed.4. New York, Harpor Collins, 1985.

Dyfyniad MLA

Hammer, Mark J., and Warren Viessman. Water Supply and Pollution Control. Ed.4. 1985.

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