APA (7th ed.) Citation

United States. Forest Service. Pacific Northwest Region & Geometronics Service Center (U.S.). Gifford Pinchot National Forest, Washington: Forest visitor map, 1992 (Rev. at the Geometronics Service Center, 1989, updated Pacific Northwest Region Office 1992.). The Office, [1992].

Chicago Style (17th ed.) Citation

United States. Forest Service. Pacific Northwest Region and Geometronics Service Center (U.S.). Gifford Pinchot National Forest, Washington: Forest Visitor Map, 1992. Rev. at the Geometronics Service Center, 1989, updated Pacific Northwest Region Office 1992. Portland, Or.: The Office, [1992].

MLA (9th ed.) Citation

United States. Forest Service. Pacific Northwest Region and Geometronics Service Center (U.S.). Gifford Pinchot National Forest, Washington: Forest Visitor Map, 1992. Rev. at the Geometronics Service Center, 1989, updated Pacific Northwest Region Office 1992. The Office, [1992].