APA (7th ed.) Citation

Arndt, H. H., Wood, G. H., & Schryver, R. F. (1973). Geologic map of the south half of the Shamokin quadrangle, Northumberland and Columbia Counties, Pennsylvania. U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Arndt, Harold H., Gordon H. Wood, and Robert F. Schryver. Geologic Map of the South Half of the Shamokin Quadrangle, Northumberland and Columbia Counties, Pennsylvania. Washington, D.C.: U.S. Geological Survey, 1973.

MLA (9th ed.) Citation

Arndt, Harold H., et al. Geologic Map of the South Half of the Shamokin Quadrangle, Northumberland and Columbia Counties, Pennsylvania. U.S. Geological Survey, 1973.