Tree Owner’s Manual – National Edition, 40 p, USDA Forest Service, July 2010.
Vegetative Management: A Guide for Puget Sound Bluff Property Owners, Elliott Menashe, 46 p, Washington State Dept. of Ecology PUB 93-31, May 1993.
Cass Turnbull’s Guide to Pruning, 3rd Edition, Cass Turnbull, 384 p., Sasquatch Books, Nov. 2012.