APA (7th ed.) Citation

United States. Department of the Interior. (1974). National Park System, regions, regional offices, and areas, 1974. U.S. Government Printing Office.

Chicago Style (17th ed.) Citation

United States. Department of the Interior. National Park System, Regions, Regional Offices, and Areas, 1974. Washington, D.C.: U.S. Government Printing Office, 1974.

MLA (9th ed.) Citation

United States. Department of the Interior. National Park System, Regions, Regional Offices, and Areas, 1974. U.S. Government Printing Office, 1974.

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