APA (7th ed.) Citation

United States. Forest Service. Alaska Region. (1997). Portage Valley, Alaska: Chugach National Forest. U.S. Dept. of Agriculture.

Chicago Style (17th ed.) Citation

United States. Forest Service. Alaska Region. Portage Valley, Alaska: Chugach National Forest. [Washington, D.C.?]: U.S. Dept. of Agriculture, 1997.

MLA (8th ed.) Citation

United States. Forest Service. Alaska Region. Portage Valley, Alaska: Chugach National Forest. U.S. Dept. of Agriculture, 1997.