APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

Topik, Christopher, et al. Plant Association and Management Guide for the Western Hemlock Zone. United States Department of Agriculture, Forest Service, Pacific Northwest Region, Gifford Pinchot National Forest, 1986.