Não informado. (1939). Contributions from the University of Michigan Herbarium. University of Michigan Herbarium.
Cita Chicago Style (17a ed.)Não informado. Contributions from the University of Michigan Herbarium. Ann Arbor, Mich: University of Michigan Herbarium, 1939.
Cita MLA (8a ed.)Não informado. Contributions from the University of Michigan Herbarium. University of Michigan Herbarium, 1939.
Precaución: Estas citas no son 100% exactas.