APA (7th ed.) Citation

Topik, C., Halverson, N. M., & Brockway, D. G. (1986). Plant association and management guide for the Western Hemlock Zone: Gifford Pinchot National Forest. U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Region.

Chicago Style (17th ed.) Citation

Topik, Christopher, Nancy M. Halverson, and Dale G. Brockway. Plant Association and Management Guide for the Western Hemlock Zone: Gifford Pinchot National Forest. [Portland, Or.?]: U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Region, 1986.

MLA (9th ed.) Citation

Topik, Christopher, et al. Plant Association and Management Guide for the Western Hemlock Zone: Gifford Pinchot National Forest. U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Region, 1986.