APA (7th ed.) Citation

United States. Forest Service. (1983). Spruce budworms situation in North America, 1982. U.S. Dept. of Agriculture, Forest Service ; Environment Canada, Canadian Forestry Service.

Chicago Style (17th ed.) Citation

United States. Forest Service. Spruce Budworms Situation in North America, 1982. [Washington, D.C.?] : [Ottawa, Ont.?]: U.S. Dept. of Agriculture, Forest Service ; Environment Canada, Canadian Forestry Service, 1983.

MLA (9th ed.) Citation

United States. Forest Service. Spruce Budworms Situation in North America, 1982. U.S. Dept. of Agriculture, Forest Service ; Environment Canada, Canadian Forestry Service, 1983.