Arno, S. F., & Hammerly, R. P. (2007). Northwest trees: Identifying and understanding the region's native trees (Anniversary ed., rev. ed.). Mountaineers Books.
Chicago Style (17th ed.) CitationArno, Stephen F., and Ramona P. Hammerly. Northwest Trees: Identifying and Understanding the Region's Native Trees. Anniversary ed., rev. ed. Seattle, WA: Mountaineers Books, 2007.
MLA (8th ed.) CitationArno, Stephen F., and Ramona P. Hammerly. Northwest Trees: Identifying and Understanding the Region's Native Trees. Anniversary ed., rev. ed. Mountaineers Books, 2007.
Warning: These citations may not always be 100% accurate.