Não informado. Notes on Water Pollution. Water Pollution Research Laboratory, Department of Scientific and Industrial Research.
Citação do estilo Chicago (17ª ed.)Não informado. Notes on Water Pollution. London: Water Pollution Research Laboratory, Department of Scientific and Industrial Research.
Citação MLA (8ª ed.)Não informado. Notes on Water Pollution. Water Pollution Research Laboratory, Department of Scientific and Industrial Research.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.