Dyfyniad APA
Pizzi, N. G. (2010). Water treatment (4th ed.). American Water Works Association.
Dyfyniad Arddull Chicago
Pizzi, Nicholas G. Water Treatment. 4th ed. Denver, Colo.: American Water Works Association, 2010.
Dyfyniad MLA
Pizzi, Nicholas G. Water Treatment. 4th ed. American Water Works Association, 2010.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.