1. Economic and Social Commission for Asia and the Pacific (ESCAP), Promotion of Non-handicapping Physical Environments for Disabled Persons: Guidelines, United Nations, New York, (1995).
2. Memorandum on Accessible Transportation from Disabled Persons Organizations and Concerned Individuals to Relevant Government Agencies and Transport Operators;Paul,2000
3. Barrier-Free Urban Environment, Paper presented at Regional Training of Trainers Course in the Promotion of Non-Handicapping Environments for People with Disabilities;Harrison,2000
4. Good City Form;Lynch,1992
5. Report of Steering Group and Working Group, Traffic in Towns. A Study of the Long Term Problems of Traffic in Urban Areas, Her Majesty's Stationery Office (Waterlow & Sons Ltd.), London and Dunstable pp. 39 (1963).