1. Suárez, R. & Bradford, B. The economic impact of the cholera epidemic in Peru: an application of the cost-of-illness methodology, WASH Field Rep. No. 415 (Water and Sanitation for Health Project, 1993).
http://pdf.dec.org/pdf_docs/PNABP618.pdf
2. A Snapshot of Sanitation in Africa WHO/UNICEF Joint Monitoring Programme for Water Supply and Sanitation (2008).
http://www.childinfo.org/areas/sanitation/Snapshot_of_Sanitation_in_Africa.pdf
3. Unravelling Sanitation Practices (WHO Geneva & UNICEF New York, 2008).
4. http://www.euro.who.int/emergencies/fieldwork/20080208_1
(2008).
5. Hutton, G. & Haller, L. Evaluation of the costs and benefits of water and sanitation improvements at the global level (Water, Sanitation and Health Protection of the Human Environment, WHO, 2004).
http://www.who.int/water_sanitation_health/wsh0404/en/index.html