Não informado. (1982). Water news. Canadian Water Resources Association.
Chicagoスタイル(17版)引用形式Não informado. Water News. Cambridge, Canada: Canadian Water Resources Association, 1982.
MLA(8版)引用形式Não informado. Water News. Canadian Water Resources Association, 1982.
警告: この引用は必ずしも正確ではありません.