Não informado. (1987). Journal of the Institution of Water and Environmental Management. Institution of Water and Environmental Management.
Chicago-referens (17:e uppl.)Não informado. Journal of the Institution of Water and Environmental Management. London: Institution of Water and Environmental Management, 1987.
MLA-referens (8:e uppl.)Não informado. Journal of the Institution of Water and Environmental Management. Institution of Water and Environmental Management, 1987.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.