APA (7th ed.) Citation

Geological Survey (U.S.) & Mixon, R. B. (2000). Geologic map of the Fredericksburg 30ʹ x 60ʹ quadrangle, Virginia and Maryland. The Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.) and Robert B. Mixon. Geologic Map of the Fredericksburg 30ʹ X 60ʹ Quadrangle, Virginia and Maryland. Reston, VA: The Survey, 2000.

MLA (9th ed.) Citation

Geological Survey (U.S.) and Robert B. Mixon. Geologic Map of the Fredericksburg 30ʹ X 60ʹ Quadrangle, Virginia and Maryland. The Survey, 2000.

Warning: These citations may not always be 100% accurate.