APA (7th ed.) Citation

United States. Forest Service. Pacific Northwest Region & United States. National Park Service. (1989). National forests and national parks of Pacific Northwest. [U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Regional Office].

Chicago Style (17th ed.) Citation

United States. Forest Service. Pacific Northwest Region and United States. National Park Service. National Forests and National Parks of Pacific Northwest. [Portland, Or.]: [U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Regional Office], 1989.

MLA (9th ed.) Citation

United States. Forest Service. Pacific Northwest Region and United States. National Park Service. National Forests and National Parks of Pacific Northwest. [U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Regional Office], 1989.