APA (7th ed.) Citation

United States. Forest Service. (1980). Tongass National Forest, Alaska, 1973 (Rev. 1980. -- Scale [1:887,000]. 14 miles to 1 in. (W 136--W 130/N 60--N 54).). The Service.

Chicago Style (17th ed.) Citation

United States. Forest Service. Tongass National Forest, Alaska, 1973. Rev. 1980. -- Scale [1:887,000]. 14 miles to 1 in. (W 136--W 130/N 60--N 54). [Washington, D.C.?]: The Service, 1980.

MLA (9th ed.) Citation

United States. Forest Service. Tongass National Forest, Alaska, 1973. Rev. 1980. -- Scale [1:887,000]. 14 miles to 1 in. (W 136--W 130/N 60--N 54). The Service, 1980.