Dyfyniad APA

Mays, L. W. (2005). Water resources systems management tools. McGraw-Hill.

Dyfyniad Arddull Chicago

Mays, Larry W. Water Resources Systems Management Tools. McGraw-Hill, 2005.

Dyfyniad MLA

Mays, Larry W. Water Resources Systems Management Tools. McGraw-Hill, 2005.

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