Northeastern Forest Experiment Station (Radnor, Pa.), United States. State and Private Forestry. Northeastern Area, Shigo, A. L., & Carroll, D. M. (1973). A tree hurts, too. U. S. Government Printing Office.
Chicago Style (17th ed.) CitationNortheastern Forest Experiment Station (Radnor, Pa.), United States. State and Private Forestry. Northeastern Area, Alex L. Shigo, and David M. Carroll. A Tree Hurts, Too. Washington: U. S. Government Printing Office, 1973.
MLA (9th ed.) CitationNortheastern Forest Experiment Station (Radnor, Pa.), et al. A Tree Hurts, Too. U. S. Government Printing Office, 1973.
Warning: These citations may not always be 100% accurate.