Não informado. (2018). Special Publication. University of Kentucky, Kentucky Geological Survey.
Chicagoスタイル(17版)引用形式Não informado. Special Publication. Lexington, Ky: University of Kentucky, Kentucky Geological Survey, 2018.
MLA(8版)引用形式Não informado. Special Publication. University of Kentucky, Kentucky Geological Survey, 2018.
警告: この引用は必ずしも正確ではありません.