APA Citation

Estados Unidos. Geological Survey. (1967). Bright Angel, Ariz. Washington: The Survey.

Chicago Style Citation

Estados Unidos. Geological Survey. Bright Angel, Ariz. Washington: The Survey, 1967.

MLA Citation

Estados Unidos. Geological Survey. Bright Angel, Ariz. Washington: The Survey, 1967.

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