Dyfyniad APA

(1997). Water resources: Environmental planning, management, and development. New York: McGraw-Hill.

Dyfyniad Arddull Chicago

Water Resources: Environmental Planning, Management, and Development. New York: McGraw-Hill, 1997.

Dyfyniad MLA

Water Resources: Environmental Planning, Management, and Development. New York: McGraw-Hill, 1997.

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