APA (7th ed.) Citation

Duigon, M. T., & Hilleary, J. T. (1981). Hampstead quadrangle--hydrogeology. State of Md., Dept. of Natural Resources, Md. Geological Survey.

Chicago Style (17th ed.) Citation

Duigon, Mark T., and John T. Hilleary. Hampstead Quadrangle--hydrogeology. Baltimore: State of Md., Dept. of Natural Resources, Md. Geological Survey, 1981.

MLA (9th ed.) Citation

Duigon, Mark T., and John T. Hilleary. Hampstead Quadrangle--hydrogeology. State of Md., Dept. of Natural Resources, Md. Geological Survey, 1981.