Service, U. S. F. (1979). Willamette trails: A hiker's guide to the Willamette National Forest ([Rev. ed.].). Willamettee National Forest.
Chicago Style (17th ed.) CitationService, United States. Forest. Willamette Trails: A Hiker's Guide to the Willamette National Forest. [Rev. ed.]. Willamettee National Forest, 1979.
MLA (8th ed.) CitationService, United States. Forest. Willamette Trails: A Hiker's Guide to the Willamette National Forest. [Rev. ed.]. Willamettee National Forest, 1979.
Warning: These citations may not always be 100% accurate.