National Arborist Association. (2000). Basic training for ground operations in tree care workbook. New York: International Society of Arboriculture and National Arborist Association.
Chicago ZitierstilNational Arborist Association. Basic Training for Ground Operations in Tree Care Workbook. New York: International Society of Arboriculture and National Arborist Association, 2000.
MLA ZitierstilNational Arborist Association. Basic Training for Ground Operations in Tree Care Workbook. New York: International Society of Arboriculture and National Arborist Association, 2000.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.