Não informado. (2010). Monographs of the United States Geological Survey. GPO.
Style de citation Chicago (17e éd.)Não informado. Monographs of the United States Geological Survey. Washington: GPO, 2010.
Style de citation MLA (8e éd.)Não informado. Monographs of the United States Geological Survey. GPO, 2010.
Attention : ces citations peuvent ne pas être correctes à 100%.