APA (7th ed.) Citation

Arno, S. F., & Hammerly, R. P. (1977). Northwest trees. Mountaineers.

Chicago Style (17th ed.) Citation

Arno, Stephen F., and Ramona P. Hammerly. Northwest Trees. Seattle: Mountaineers, 1977.

MLA (9th ed.) Citation

Arno, Stephen F., and Ramona P. Hammerly. Northwest Trees. Mountaineers, 1977.

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