Não informado. (1972). Geos. Department of Energy, Mines and Resources.
Chicagoスタイル(17版)引用形式Não informado. Geos. Ottawa: Department of Energy, Mines and Resources, 1972.
MLA(8版)引用形式Não informado. Geos. Department of Energy, Mines and Resources, 1972.
警告: この引用は必ずしも正確ではありません.