1. Abdala, M. A. (1996). Welfare effects of Buenos Aires’ water and sewerage services privatization. Expectativa Economic Consultants and Universidad de San Andres.
2. Ahmad, J., Goldar, B. N., Misra, S., & Jakariya, M. (2003). Fighting arsenic: Listening to rural communities. Willingness to pay for arsenic-free, safe drinking water in Bangladesh. Water and Sanitation Program – South Asia.
3. Determinants of demand for infrastructure in rural and urban Nigeria;Alaba,2002
4. Asian Development Bank (ADB). (2000). Country economic review – Cambodia. .
5. Bachrach, M., & Vaughan, W. J. (1994). Household water demand estimation. Working paper ENP106, Inter-American Development Bank.