Não informado. (1977). Water quality international. International Association on Water Pollution Research and Control.
Lua i Stíl Chicago (17ú heag.)Não informado. Water Quality International. London: International Association on Water Pollution Research and Control, 1977.
Lua MLA (8ú heag.)Não informado. Water Quality International. International Association on Water Pollution Research and Control, 1977.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.