Não informado. (1939). Contributions from the University of Michigan Herbarium. University of Michigan Herbarium.
Style de citation Chicago (17e éd.)Não informado. Contributions from the University of Michigan Herbarium. Ann Arbor, Mich: University of Michigan Herbarium, 1939.
Style de citation MLA (8e éd.)Não informado. Contributions from the University of Michigan Herbarium. University of Michigan Herbarium, 1939.
Attention : ces citations peuvent ne pas être correctes à 100%.