Shigo, A. L. (1991). Modern arboriculture: A systems approach to the care of trees and their associates. Shigo and Trees Associates.
Cita Chicago Style (17a ed.)Shigo, Alex L. Modern Arboriculture: A Systems Approach to the Care of Trees and Their Associates. Durham: Shigo and Trees Associates, 1991.
Cita MLA (8a ed.)Shigo, Alex L. Modern Arboriculture: A Systems Approach to the Care of Trees and Their Associates. Shigo and Trees Associates, 1991.
Precaución: Estas citas no son 100% exactas.