APA (7th ed.) Citation

Snyder, G. L. (1980). Geologic map of the northernmost Park Range and the southernmost Sierra Madre, Jackson and Routt Counties, Colorado. The Survey.

Chicago Style (17th ed.) Citation

Snyder, George L. Geologic Map of the Northernmost Park Range and the Southernmost Sierra Madre, Jackson and Routt Counties, Colorado. Reston, Va.: The Survey, 1980.

MLA (9th ed.) Citation

Snyder, George L. Geologic Map of the Northernmost Park Range and the Southernmost Sierra Madre, Jackson and Routt Counties, Colorado. The Survey, 1980.