World Health Organization & World Health Organization. (2005). Water for life, making it happen. World Health Orgnization.
Chicago-referens (17:e uppl.)World Health Organization och World Health Organization. Water for Life, Making It Happen. : World Health Orgnization, 2005.
MLA-referens (9:e uppl.)World Health Organization och World Health Organization. Water for Life, Making It Happen. World Health Orgnization, 2005.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.