APA (7th ed.) Citation

Mason, R. R., & Torgersen, T. R. (1983). Douglas-fir tussock moth handbook: How to predict population trends. U.S. Dept. of Agriculture, Combined Forest Pest Research and Development Program.

Chicago Style (17th ed.) Citation

Mason, Richard R., and Torolf R. Torgersen. Douglas-fir Tussock Moth Handbook: How to Predict Population Trends. [Washington, D.C.?]: U.S. Dept. of Agriculture, Combined Forest Pest Research and Development Program, 1983.

MLA (9th ed.) Citation

Mason, Richard R., and Torolf R. Torgersen. Douglas-fir Tussock Moth Handbook: How to Predict Population Trends. U.S. Dept. of Agriculture, Combined Forest Pest Research and Development Program, 1983.