Dyfyniad APA

Todd, D. K. (2005). Groundwater hydrology/2nd ed (2nd ed.). John Wiley and Sons.

Dyfyniad Arddull Chicago

Todd, David Keith. Groundwater Hydrology/2nd Ed. 2nd ed. USA: John Wiley and Sons, 2005.

Dyfyniad MLA

Todd, David Keith. Groundwater Hydrology/2nd Ed. 2nd ed. John Wiley and Sons, 2005.

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