Dyfyniad APA

American water works association. (1971). Water quality and treatment: : 3rd ed (3rd ed.). Mc Graw- Hill.

Dyfyniad Arddull Chicago

American water works association. Water Quality and Treatment: : 3rd Ed. 3rd ed. New York: Mc Graw- Hill, 1971.

Dyfyniad MLA

American water works association. Water Quality and Treatment: : 3rd Ed. 3rd ed. Mc Graw- Hill, 1971.

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