Não informado. (1891). Contributions from the Gray Herbarium of Harvard University. Harvard University.
Chicagoスタイル(17版)引用形式Não informado. Contributions from the Gray Herbarium of Harvard University. Cambridge, Mass: Harvard University, 1891.
MLA(8版)引用形式Não informado. Contributions from the Gray Herbarium of Harvard University. Harvard University, 1891.
警告: この引用は必ずしも正確ではありません.