Dyfyniad APA

TWORT, A., LAW, F., & CROWLEY, F. (1985). Water supply.-- ed.3. Edward Arnold.

Dyfyniad Arddull Chicago

TWORT, AC, FM LAW, and FW CROWLEY. Water Supply.-- Ed.3. London: Edward Arnold, 1985.

Dyfyniad MLA

TWORT, AC, et al. Water Supply.-- Ed.3. Edward Arnold, 1985.

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