Não informado. (1927). Contributions from the Dudley Herbarium. Stanford University, Natural History Museum.
Chicago-viite (17. p.)Não informado. Contributions from the Dudley Herbarium. Palo Alto, Calif: Stanford University, Natural History Museum, 1927.
MLA-viite (8. p.)Não informado. Contributions from the Dudley Herbarium. Stanford University, Natural History Museum, 1927.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.