Dyfyniad APA

WALTON, W. C. (1970). Groundwater Resource Evaluation William C. Walton. McGraw-Hill.

Dyfyniad Arddull Chicago

WALTON, William C. Groundwater Resource Evaluation William C. Walton. McGraw-Hill, 1970.

Dyfyniad MLA

WALTON, William C. Groundwater Resource Evaluation William C. Walton. McGraw-Hill, 1970.

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