APA (7th ed.) Citation

Sachet, J. K. A., Briggs, D. G., & Fight, R. D. (1989). Tree value system: Users guide. U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station.

Chicago Style (17th ed.) Citation

Sachet, Janet K. Ayer, David George Briggs, and Roger D. Fight. Tree Value System: Users Guide. Portland, Or.: U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, 1989.

MLA (9th ed.) Citation

Sachet, Janet K. Ayer, et al. Tree Value System: Users Guide. U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, 1989.