European Water Pollution Control Association. (1991). European water pollution control. Elsevier Science.
Citação do estilo Chicago (17ª ed.)European Water Pollution Control Association. European Water Pollution Control. Amsterdam: Elsevier Science, 1991.
Citação MLA (8ª ed.)European Water Pollution Control Association. European Water Pollution Control. Elsevier Science, 1991.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.