APA (7th ed.) Citation

Arndt, H. H. (1973). Geologic map of the Mount Carmel quadrangle, Columbia, Northumberland, and Schuylkill Counties, Pennsylvania. U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Arndt, Harold H. Geologic Map of the Mount Carmel Quadrangle, Columbia, Northumberland, and Schuylkill Counties, Pennsylvania. Washington, D.C.: U.S. Geological Survey, 1973.

MLA (9th ed.) Citation

Arndt, Harold H. Geologic Map of the Mount Carmel Quadrangle, Columbia, Northumberland, and Schuylkill Counties, Pennsylvania. U.S. Geological Survey, 1973.