Não informado. (1939). Contributions from the University of Michigan Herbarium. University of Michigan Herbarium.
Chicagoスタイル(17版)引用形式Não informado. Contributions from the University of Michigan Herbarium. Ann Arbor, Mich: University of Michigan Herbarium, 1939.
MLA(8版)引用形式Não informado. Contributions from the University of Michigan Herbarium. University of Michigan Herbarium, 1939.
警告: この引用は必ずしも正確ではありません.