Não informado. (1970). Laitsch Herbarium Publication. Youngstown State University.
Chicagoスタイル(17版)引用形式Não informado. Laitsch Herbarium Publication. Youngstown, Ohio: Youngstown State University, 1970.
MLA(8版)引用形式Não informado. Laitsch Herbarium Publication. Youngstown State University, 1970.
警告: この引用は必ずしも正確ではありません.