United States. Cooperative State Research Service. (1984). Spruce budworms handbook: Guidelines for the operational use of Bacillus thuringiensis against the spruce budworm. U.S. Dept. of Agriculture, Forest Service, Cooperative State Research Service.
Chicago Style (17th ed.) CitationUnited States. Cooperative State Research Service. Spruce Budworms Handbook: Guidelines for the Operational Use of Bacillus Thuringiensis Against the Spruce Budworm. [Washington, D.C.?]: U.S. Dept. of Agriculture, Forest Service, Cooperative State Research Service, 1984.
MLA (9th ed.) CitationUnited States. Cooperative State Research Service. Spruce Budworms Handbook: Guidelines for the Operational Use of Bacillus Thuringiensis Against the Spruce Budworm. U.S. Dept. of Agriculture, Forest Service, Cooperative State Research Service, 1984.