Dyfyniad APA

(1976). Standard methods for the examination of water and: Wastewater (14th ed.). American Health Public Association.

Dyfyniad Arddull Chicago

Standard Methods for the Examination of Water and: Wastewater. 14th ed. Washington, DC: American Health Public Association, 1976.

Dyfyniad MLA

Standard Methods for the Examination of Water and: Wastewater. 14th ed. American Health Public Association, 1976.

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