APA (7th ed.) Citation

United States. Forest Service. Pacific Northwest Region. (1978). Forest trails of the Columbia Gorge. Forest Service, USDA, Pacific Northwest Region.

Chicago Style (17th ed.) Citation

United States. Forest Service. Pacific Northwest Region. Forest Trails of the Columbia Gorge. [Portland, Or.?]: Forest Service, USDA, Pacific Northwest Region, 1978.

MLA (9th ed.) Citation

United States. Forest Service. Pacific Northwest Region. Forest Trails of the Columbia Gorge. Forest Service, USDA, Pacific Northwest Region, 1978.

Warning: These citations may not always be 100% accurate.