1. Arasu , S. 1992 An Outline of Water Distribution System Management in Singapore 8th ASPAC-IWSA Regional Water Supply Conf., Kuala Lumpur, Malaysia
2. Asian Water & Sewage 1995 Singapore Government: Raising Water Tax Helped Reduce Water Consumption. May-June:7
3. Bradley , R.M. Mediwake , T.M.M. 1992 Towards Financial Viability-the Case of the NWSDB, Sri Lanka 8th ASPAC-IWSA Regional Water Supply Conf Kuala Lumpur, Malaysia.