APA (7th ed.) Citation

Geological Survey (U.S.) & Du Bray, E. A. (1993). Geologic map of the Big Timber stock and vicinity, southern Crazy Mountains, Sweet Grass and Park counties, south-central Montana. The Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.) and E. A. Du Bray. Geologic Map of the Big Timber Stock and Vicinity, Southern Crazy Mountains, Sweet Grass and Park Counties, South-central Montana. Reston, VA: The Survey, 1993.

MLA (9th ed.) Citation

Geological Survey (U.S.) and E. A. Du Bray. Geologic Map of the Big Timber Stock and Vicinity, Southern Crazy Mountains, Sweet Grass and Park Counties, South-central Montana. The Survey, 1993.