APA (7th ed.) Citation

Briggs, D. G. (1989). Tree value system: Description and assumptions. U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station.

Chicago Style (17th ed.) Citation

Briggs, David George. Tree Value System: Description and Assumptions. Portland, Or.: U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, 1989.

MLA (9th ed.) Citation

Briggs, David George. Tree Value System: Description and Assumptions. U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, 1989.