Não informado. (1988). Federation Highlights. Water Pollution Control Federation.
Chicagoスタイル(17版)引用形式Não informado. Federation Highlights. Alexandria, Va: Water Pollution Control Federation, 1988.
MLA(8版)引用形式Não informado. Federation Highlights. Water Pollution Control Federation, 1988.
警告: この引用は必ずしも正確ではありません.