APA (7th ed.) Citation

Trombley, T. J., & Zynjuk, L. D. (1985). Hydrogeology and water quality of the Catoctin Mountain National Park Area, Frederick County, Maryland. U.S. Dept. of the Interior, Geological Survey.

Chicago Style (17th ed.) Citation

Trombley, Thomas J., and Linda D. Zynjuk. Hydrogeology and Water Quality of the Catoctin Mountain National Park Area, Frederick County, Maryland. Towson, Md.: U.S. Dept. of the Interior, Geological Survey, 1985.

MLA (9th ed.) Citation

Trombley, Thomas J., and Linda D. Zynjuk. Hydrogeology and Water Quality of the Catoctin Mountain National Park Area, Frederick County, Maryland. U.S. Dept. of the Interior, Geological Survey, 1985.