Não informado. (2000). Trees magazine. National Arborist Association.
Chicagoスタイル(17版)引用形式Não informado. Trees Magazine. Santa Monica, Calif: National Arborist Association, 2000.
MLA(8版)引用形式Não informado. Trees Magazine. National Arborist Association, 2000.
警告: この引用は必ずしも正確ではありません.