Shigo, A. L. (1991). Modern arboriculture: A systems approach to the care of trees and their associates. Shigo and Trees.
Chicago-Zitierstil (17. Ausg.)Shigo, Alex L. Modern Arboriculture: A Systems Approach to the Care of Trees and Their Associates. Durham, NH: Shigo and Trees, 1991.
MLA-Zitierstil (9. Ausg.)Shigo, Alex L. Modern Arboriculture: A Systems Approach to the Care of Trees and Their Associates. Shigo and Trees, 1991.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.