Dyfyniad APA

(2006). Water-quality trading: A guide for the wastewater community. New York: McGraw-Hill.

Dyfyniad Arddull Chicago

Water-quality Trading: A Guide for the Wastewater Community. New York: McGraw-Hill, 2006.

Dyfyniad MLA

Water-quality Trading: A Guide for the Wastewater Community. New York: McGraw-Hill, 2006.

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