Não informado. (1966). Resource Bulletin NC. North Central Forest Experiment Station, Forest Service.
Chicagoスタイル(17版)引用形式Não informado. Resource Bulletin NC. Saint Paul, Minn: North Central Forest Experiment Station, Forest Service, 1966.
MLA(8版)引用形式Não informado. Resource Bulletin NC. North Central Forest Experiment Station, Forest Service, 1966.
警告: この引用は必ずしも正確ではありません.