Não informado. (1977). International water report. Water Information Center.
Chicagoスタイル(17版)引用形式Não informado. International Water Report. New York: Water Information Center, 1977.
MLA(8版)引用形式Não informado. International Water Report. Water Information Center, 1977.
警告: この引用は必ずしも正確ではありません.