APA (7th ed.) Citation

Geological Survey (U.S.) & Pennsylvania. Bureau of Topographic and Geologic Survey. (1945). Pennsylvania, 7.5 minute series (topographic). U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.) and Pennsylvania. Bureau of Topographic and Geologic Survey. Pennsylvania, 7.5 Minute Series (topographic). Reston, Va.: U.S. Geological Survey, 1945.

MLA (9th ed.) Citation

Geological Survey (U.S.) and Pennsylvania. Bureau of Topographic and Geologic Survey. Pennsylvania, 7.5 Minute Series (topographic). U.S. Geological Survey, 1945.