APA (7th ed.) Citation

United States. Forest Service. Northern Region. (1990). Lewis and Clark in the Rocky Mountains. U.S. Dept. of Agriculture, Forest Service, Northern Region.

Chicago Style (17th ed.) Citation

United States. Forest Service. Northern Region. Lewis and Clark in the Rocky Mountains. [Missoula, Mont.?]: U.S. Dept. of Agriculture, Forest Service, Northern Region, 1990.

MLA (9th ed.) Citation

United States. Forest Service. Northern Region. Lewis and Clark in the Rocky Mountains. U.S. Dept. of Agriculture, Forest Service, Northern Region, 1990.