APA (7th ed.) Citation

Geological Survey, Douglas, E. M., & Matthes, F. (1938). Map of Yosemite Valley, Yosemite National Park, California, Mariposa County. The Survey.

Chicago Style (17th ed.) Citation

Geological Survey, E. M. Douglas, and Franc╠žois Matthes. Map of Yosemite Valley, Yosemite National Park, California, Mariposa County. [Washington]: The Survey, 1938.

MLA (8th ed.) Citation

Geological Survey, et al. Map of Yosemite Valley, Yosemite National Park, California, Mariposa County. The Survey, 1938.

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