Não informado. (2001). Special Report. California Division of Mines and Geology.
Chicagoスタイル(17版)引用形式Não informado. Special Report. San Francisco, Calif: California Division of Mines and Geology, 2001.
MLA(8版)引用形式Não informado. Special Report. California Division of Mines and Geology, 2001.
警告: この引用は必ずしも正確ではありません.