Não informado. (1890). Contributions from the United States National Herbarium. Smithsonian Institution.
Chicago-viite (17. p.)Não informado. Contributions from the United States National Herbarium. Washington: Smithsonian Institution, 1890.
MLA-viite (8. p.)Não informado. Contributions from the United States National Herbarium. Smithsonian Institution, 1890.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.