APA (7th ed.) Citation

Geological Survey (U.S.). (1981). Hardin, Montana. U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.). Hardin, Montana. Reston, Va.: U.S. Geological Survey, 1981.

MLA (9th ed.) Citation

Geological Survey (U.S.). Hardin, Montana. U.S. Geological Survey, 1981.

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