APA (7th ed.) Citation

United States. Forest Service. Rocky Mountain Region. (1989). National forests and national grasslands of the Rocky Mountain Region. U.S. Dept. of Agriculture, Forest Service.

Chicago Style (17th ed.) Citation

United States. Forest Service. Rocky Mountain Region. National Forests and National Grasslands of the Rocky Mountain Region. [Denver, Colo.?]: U.S. Dept. of Agriculture, Forest Service, 1989.

MLA (9th ed.) Citation

United States. Forest Service. Rocky Mountain Region. National Forests and National Grasslands of the Rocky Mountain Region. U.S. Dept. of Agriculture, Forest Service, 1989.