United States. Bureau of Mines & United States. Department of the Interior. (1988). Minerals yearbook. U.S. Department of the Interior.
Chicagoスタイル(17版)引用形式United States. Bureau of Mines , United States. Department of the Interior. Minerals Yearbook. Washington, DC: U.S. Department of the Interior, 1988.
MLA(9版)引用形式United States. Bureau of Mines , United States. Department of the Interior. Minerals Yearbook. U.S. Department of the Interior, 1988.
警告: この引用は必ずしも正確ではありません.