Dyfyniad APA

DEMING, D. (2002). Introduction to hydrogeology.-- ed.1. McGraw-Hill.

Dyfyniad Arddull Chicago

DEMING, David. Introduction to Hydrogeology.-- Ed.1. Boston: McGraw-Hill, 2002.

Dyfyniad MLA

DEMING, David. Introduction to Hydrogeology.-- Ed.1. McGraw-Hill, 2002.

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