APA (7th ed.) Citation

Embrey, S. S., & Runkle, D. L. (2006). Microbial quality of the nation's ground-water resources, 1993-2004. U.S. Dept. of the Interior, U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Embrey, S. S., and Donna L. Runkle. Microbial Quality of the Nation's Ground-water Resources, 1993-2004. Reston, Va.: U.S. Dept. of the Interior, U.S. Geological Survey, 2006.

MLA (9th ed.) Citation

Embrey, S. S., and Donna L. Runkle. Microbial Quality of the Nation's Ground-water Resources, 1993-2004. U.S. Dept. of the Interior, U.S. Geological Survey, 2006.