Dyfyniad APA

Mays, L. W. (2007). Water resources sustainability. New York,Alexandria, Va: McGraw-Hill,WEF Press.

Dyfyniad Arddull Chicago

Mays, Larry W. Water Resources Sustainability. New York,Alexandria, Va: McGraw-Hill,WEF Press, 2007.

Dyfyniad MLA

Mays, Larry W. Water Resources Sustainability. New York,Alexandria, Va: McGraw-Hill,WEF Press, 2007.

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