Não informado. Regulatory Announcement. U.S. Fish and Wildlife Service.
Chicagoスタイル(17版)引用形式Não informado. Regulatory Announcement. Washington: U.S. Fish and Wildlife Service.
MLA(8版)引用形式Não informado. Regulatory Announcement. U.S. Fish and Wildlife Service.
警告: この引用は必ずしも正確ではありません.