Willamette National Forest (Agency : U.S.). (2015). Christmas tree harvest map (Revised 9/15.). U.S. Department of Agriculture, U.S. Forest Service.
Chicago Style (17th ed.) CitationWillamette National Forest (Agency : U.S.). Christmas Tree Harvest Map. Revised 9/15. [Springfield, Oregon]: U.S. Department of Agriculture, U.S. Forest Service, 2015.
MLA (9th ed.) CitationWillamette National Forest (Agency : U.S.). Christmas Tree Harvest Map. Revised 9/15. U.S. Department of Agriculture, U.S. Forest Service, 2015.
Warning: These citations may not always be 100% accurate.