World Health Organization. (2006). Guidelines for safe recreational water environmnets: Swimming pools and similar environments. World Health organization.
Chicago-referens (17:e uppl.)World Health Organization. Guidelines for Safe Recreational Water Environmnets: Swimming Pools and Similar Environments. Geneva: World Health organization, 2006.
MLA-referens (8:e uppl.)World Health Organization. Guidelines for Safe Recreational Water Environmnets: Swimming Pools and Similar Environments. World Health organization, 2006.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.