APA (7th ed.) Citation

Pettinger, L. F., & Goheen, D. J. (1982). A field guide to important forest insects and diseases of Oregon and Washington (1972, updated 1982.). Forest Pest Management, State and Private Forestry, Pacific Northwest Region, Forest Service, U.S. Dept. of Agriculture.

Chicago Style (17th ed.) Citation

Pettinger, L. F., and D. J. Goheen. A Field Guide to Important Forest Insects and Diseases of Oregon and Washington. 1972, updated 1982. [Portland, Or.?]: Forest Pest Management, State and Private Forestry, Pacific Northwest Region, Forest Service, U.S. Dept. of Agriculture, 1982.

MLA (9th ed.) Citation

Pettinger, L. F., and D. J. Goheen. A Field Guide to Important Forest Insects and Diseases of Oregon and Washington. 1972, updated 1982. Forest Pest Management, State and Private Forestry, Pacific Northwest Region, Forest Service, U.S. Dept. of Agriculture, 1982.