APA (7th ed.) Citation

American Water Works Association, Valentine, M., & Armstrong, C. (2014). Groundwater (Fourth edition.). American Water Works Association.

Chicago Style (17th ed.) Citation

American Water Works Association, Melissa Valentine, and Cheryl Armstrong. Groundwater. Fourth edition. Denver, Colorado: American Water Works Association, 2014.

MLA (9th ed.) Citation

American Water Works Association, et al. Groundwater. Fourth edition. American Water Works Association, 2014.