1. http://www.un.org/waterforlifedecade/scarcity.shtml
2. Safer Water, Better Health: Costs, Benefits, and Sustainability of Interventions to Protect and Promote Health; Updated Table 1: WSH Deaths by Region, 2004;World Health Organization (WHO),2008
3. The Millennium Development Goals Report 2012;United Nations,2012
4. The Millennium Development Goals;Wikipedia,2013
5. Sustainable Development Goals;United Nations Sustainable Development Platform,2013