1. Alexander, B. (1970). ?The Basic Inadequacy of Conventional Urban Transportation Modes.? In: D. Brand, ed., Urban Transportation Innovation. New York: American Society of Civil Engineers.
2. Barber, R. J. (1971). Report on National Transportation Policies. Prepared for Aviation Advisory Commission by Systems Analysis and Research Corporation.
3. Boorstin, D. S. (1973). The Americans: The Democratic Experience. New York: Random House.
4. Brand, D., ed., (1970). Urban Transportation Innovation. New York: American Society of Civil Engineers.
5. Buchanan, C. (1963). Traffic in Towns, London: H. M. Stationery Office.