Não informado. (1931). Geological Bulletin. Department of Conservation, Geological Survey.
Chicagoスタイル(17版)引用形式Não informado. Geological Bulletin. New Orleans, La: Department of Conservation, Geological Survey, 1931.
MLA(8版)引用形式Não informado. Geological Bulletin. Department of Conservation, Geological Survey, 1931.
警告: この引用は必ずしも正確ではありません.