Não informado. (1969). British water supply. British Waterworks Association.
Chicagoスタイル(17版)引用形式Não informado. British Water Supply. London: British Waterworks Association, 1969.
MLA(8版)引用形式Não informado. British Water Supply. British Waterworks Association, 1969.
警告: この引用は必ずしも正確ではありません.