APA (7th ed.) Citation

McGrew, L. W. (1977). Geologic map of the Sixteen quadrangle, Gallatin and Meagher Counties, Montana. U.S. Geological Survey.

Chicago Style (17th ed.) Citation

McGrew, Laura W. Geologic Map of the Sixteen Quadrangle, Gallatin and Meagher Counties, Montana. Reston, Va.: U.S. Geological Survey, 1977.

MLA (9th ed.) Citation

McGrew, Laura W. Geologic Map of the Sixteen Quadrangle, Gallatin and Meagher Counties, Montana. U.S. Geological Survey, 1977.