APA (7th ed.) Citation

Duigon, M. T. (1983). Hydrogeologic atlas, New Freedom quadrangle, Baltimore County, Maryland. Maryland Geological Survey.

Chicago Style (17th ed.) Citation

Duigon, Mark T. Hydrogeologic Atlas, New Freedom Quadrangle, Baltimore County, Maryland. Baltimore, Md.: Maryland Geological Survey, 1983.

MLA (9th ed.) Citation

Duigon, Mark T. Hydrogeologic Atlas, New Freedom Quadrangle, Baltimore County, Maryland. Maryland Geological Survey, 1983.