APA (7th ed.) Citation

United States. Forest Service. Pacific Northwest Region & Geometronics Service Center (U.S.). (1991). Olympic National Forest and Olympic National Park (Rev. in 1987.). The Office.

Chicago Style (17th ed.) Citation

United States. Forest Service. Pacific Northwest Region and Geometronics Service Center (U.S.). Olympic National Forest and Olympic National Park. Rev. in 1987. Portland, Or.: The Office, 1991.

MLA (9th ed.) Citation

United States. Forest Service. Pacific Northwest Region and Geometronics Service Center (U.S.). Olympic National Forest and Olympic National Park. Rev. in 1987. The Office, 1991.