Não informado. (1894). Bulletin. South Dakota Geological and Natural History Survey.
Style de citation Chicago (17e éd.)Não informado. Bulletin. Vermillion, SD: South Dakota Geological and Natural History Survey, 1894.
Style de citation MLA (8e éd.)Não informado. Bulletin. South Dakota Geological and Natural History Survey, 1894.
Attention : ces citations peuvent ne pas être correctes à 100%.