APA (7th ed.) Citation

Knovel (Firm) & American Water Works Association. (2003). Groundwater (3rd ed.). American Water Works Association.

Chicago Style (17th ed.) Citation

Knovel (Firm) and American Water Works Association. Groundwater. 3rd ed. Denver, CO: American Water Works Association, 2003.

MLA (9th ed.) Citation

Knovel (Firm) and American Water Works Association. Groundwater. 3rd ed. American Water Works Association, 2003.