Não informado. (1992). Water Environment Research. Water Environment Federation.
Chicago-referens (17:e uppl.)Não informado. Water Environment Research. Alexandria, Va: Water Environment Federation, 1992.
MLA-referens (8:e uppl.)Não informado. Water Environment Research. Water Environment Federation, 1992.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.