APA (7th ed.) Citation

United States. National Park Service. Natural Bridges National Monument: Dec. 1966 (Rev. Dec. 1971.).

Chicago Style (17th ed.) Citation

United States. National Park Service. Natural Bridges National Monument: Dec. 1966. Rev. Dec. 1971.

MLA (9th ed.) Citation

United States. National Park Service. Natural Bridges National Monument: Dec. 1966. Rev. Dec. 1971.

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