Dyfyniad APA

Todd David Keith & Mays, L. W. (2005). Groundwater hydrology (Third edition.). AUWSF.

Dyfyniad Arddull Chicago

Todd David Keith and Larry W. Mays. Groundwater Hydrology. Third edition. New Jersey: AUWSF, 2005.

Dyfyniad MLA

Todd David Keith and Larry W. Mays. Groundwater Hydrology. Third edition. AUWSF, 2005.

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