Não informado. (1890). Contributions from the United States National Herbarium. Smithsonian Institution.
Style de citation Chicago (17e éd.)Não informado. Contributions from the United States National Herbarium. Washington: Smithsonian Institution, 1890.
Style de citation MLA (8e éd.)Não informado. Contributions from the United States National Herbarium. Smithsonian Institution, 1890.
Attention : ces citations peuvent ne pas être correctes à 100%.