APA(7版)引用形式

Não informado. (1999). United States Geological Survey annual report. U.S. Geological Survey.

Chicagoスタイル(17版)引用形式

Não informado. United States Geological Survey Annual Report. Washington: U.S. Geological Survey, 1999.

MLA(8版)引用形式

Não informado. United States Geological Survey Annual Report. U.S. Geological Survey, 1999.

警告: この引用は必ずしも正確ではありません.