APA (7th ed.) Citation

Ernst, R. L., & Marquis, D. A. (1979). Tree grade distribution in Allegheny hardwoods. Dept. of Agriculture, Forest Service, Northeastern Forest Experiment Station.

Chicago Style (17th ed.) Citation

Ernst, Richard L., and David A. Marquis. Tree Grade Distribution in Allegheny Hardwoods. Broomall, Pa.: Dept. of Agriculture, Forest Service, Northeastern Forest Experiment Station, 1979.

MLA (9th ed.) Citation

Ernst, Richard L., and David A. Marquis. Tree Grade Distribution in Allegheny Hardwoods. Dept. of Agriculture, Forest Service, Northeastern Forest Experiment Station, 1979.