APA (7th ed.) Citation

Curtis, R. O., & Pacific Northwest Research Station. (2008). True fir spacing trials: 10-year results. U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station.

Chicago Style (17th ed.) Citation

Curtis, Robert O., and Pacific Northwest Research Station. True Fir Spacing Trials: 10-year Results. [Portland, Or.]: U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, 2008.

MLA (8th ed.) Citation

Curtis, Robert O., and Pacific Northwest Research Station. True Fir Spacing Trials: 10-year Results. U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, 2008.