APA (7th ed.) Citation

Harris, A. S. (1984). Sitka spruce (Revised February 1984.). Forest Service, United States Department of Agriculture.

Chicago Style (17th ed.) Citation

Harris, A. S. Sitka Spruce. Revised February 1984. [Washington, D.C.?]: Forest Service, United States Department of Agriculture, 1984.

MLA (8th ed.) Citation

Harris, A. S. Sitka Spruce. Revised February 1984. Forest Service, United States Department of Agriculture, 1984.