Não informado. (1977). Water quality international. International Association on Water Pollution Research and Control.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Water Quality International. London: International Association on Water Pollution Research and Control, 1977.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Water Quality International. International Association on Water Pollution Research and Control, 1977.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.