Não informado. (2019). Newsletter. Pennsylvania State University, Environmental Resources Research Institute.
Chicagoスタイル(17版)引用形式Não informado. Newsletter. University Park, Pa: Pennsylvania State University, Environmental Resources Research Institute, 2019.
MLA(8版)引用形式Não informado. Newsletter. Pennsylvania State University, Environmental Resources Research Institute, 2019.
警告: この引用は必ずしも正確ではありません.