Não informado. (2018). Research Circular. Pennsylvania Department of Forests and Waters.
Chicagoスタイル(17版)引用形式Não informado. Research Circular. Harrisburg, Pa: Pennsylvania Department of Forests and Waters, 2018.
MLA(8版)引用形式Não informado. Research Circular. Pennsylvania Department of Forests and Waters, 2018.
警告: この引用は必ずしも正確ではありません.