APA(7版)引用形式

Não informado. (2001). Annual report of the United States Geological Survey. U.S. Geological Survey.

Chicagoスタイル(17版)引用形式

Não informado. Annual Report of the United States Geological Survey. Washington: U.S. Geological Survey, 2001.

MLA(8版)引用形式

Não informado. Annual Report of the United States Geological Survey. U.S. Geological Survey, 2001.

警告: この引用は必ずしも正確ではありません.