Não informado. (1999). Special report. Wisconsin Geological and Natural History Survey.
Style de citation Chicago (17e éd.)Não informado. Special Report. Madison, Wis: Wisconsin Geological and Natural History Survey, 1999.
Style de citation MLA (8e éd.)Não informado. Special Report. Wisconsin Geological and Natural History Survey, 1999.
Attention : ces citations peuvent ne pas être correctes à 100%.