APA (7th ed.) Citation

United States. Forest Service & Holsten, E. H. (1999). The spruce beetle (Rev. Nov. 1999.). U.S. Dept. of Agriculture, Forest Service.

Chicago Style (17th ed.) Citation

United States. Forest Service and Edward H. Holsten. The Spruce Beetle. Rev. Nov. 1999. [Washington, D.C.]: U.S. Dept. of Agriculture, Forest Service, 1999.

MLA (9th ed.) Citation

United States. Forest Service and Edward H. Holsten. The Spruce Beetle. Rev. Nov. 1999. U.S. Dept. of Agriculture, Forest Service, 1999.