Arno, S. F., & Hammerly, R. P. (2020). Northwest trees: Identifying and understanding the region's native trees (Field guide edition.).
Cita Chicago Style (17a ed.)Arno, Stephen F., y Ramona P. Hammerly. Northwest Trees: Identifying and Understanding the Region's Native Trees. Field guide edition. Seattle, WA : Mountaineers Books, 2020.
Cita MLA (8a ed.)Arno, Stephen F., y Ramona P. Hammerly. Northwest Trees: Identifying and Understanding the Region's Native Trees. Field guide edition. 2020.
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