APA (7th ed.) Citation

United States. National Park Service. (1917). Regulations governing Rocky Mountain National Park, in effect May 1, 1917. U.S. GPO.

Chicago Style (17th ed.) Citation

United States. National Park Service. Regulations Governing Rocky Mountain National Park, in Effect May 1, 1917. Washington: U.S. GPO, 1917.

MLA (9th ed.) Citation

United States. National Park Service. Regulations Governing Rocky Mountain National Park, in Effect May 1, 1917. U.S. GPO, 1917.

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