Não informado. Water-related Disease Outbreaks Surveillance. Center for Disease Control.
Chicago-referens (17:e uppl.)Não informado. Water-related Disease Outbreaks Surveillance. Atlanta, Ga: Center for Disease Control.
MLA-referens (8:e uppl.)Não informado. Water-related Disease Outbreaks Surveillance. Center for Disease Control.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.