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 François 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.