Wykoff, W., Crookston, N. L., & Stage, A. R. (1981). User's guide to the Stand Prognosis Model. U.S. Dept. of Agriculture, Forest Service, Intermountain Forest and Range Experiment Station.
Chicago Style (17th ed.) CitationWykoff, W., Nicholas L. Crookston, and Albert R. Stage. User's Guide to the Stand Prognosis Model. Ogden, Utah: U.S. Dept. of Agriculture, Forest Service, Intermountain Forest and Range Experiment Station, 1981.
MLA (9th ed.) CitationWykoff, W., et al. User's Guide to the Stand Prognosis Model. U.S. Dept. of Agriculture, Forest Service, Intermountain Forest and Range Experiment Station, 1981.
Warning: These citations may not always be 100% accurate.