APA (7th ed.) Citation

United States. Forest Service. Northern Region. (1983). National Forests, Northern Region, 1981 (Rev. 82.). The Service.

Chicago Style (17th ed.) Citation

United States. Forest Service. Northern Region. National Forests, Northern Region, 1981. Rev. 82. Missoula, MT: The Service, 1983.

MLA (9th ed.) Citation

United States. Forest Service. Northern Region. National Forests, Northern Region, 1981. Rev. 82. The Service, 1983.