Não informado. (2009). Mines and Mineral Statistics. Commissioner of Mineral Statistics of the State of Michigan.
Style de citation Chicago (17e éd.)Não informado. Mines and Mineral Statistics. Lansing, Mich: Commissioner of Mineral Statistics of the State of Michigan, 2009.
Style de citation MLA (8e éd.)Não informado. Mines and Mineral Statistics. Commissioner of Mineral Statistics of the State of Michigan, 2009.
Attention : ces citations peuvent ne pas être correctes à 100%.