1Hall P.. The World Cities[M]. London: Heinemann, 1966.
2Friedmann J.. The World City Hyporthesis. [J]. Development and Change, 1986,17.
3Sassen S.. The Global City: New York, London, Tokyo[M]. Princeton: Princeton University Press, 1991.
4Friedmann J.. Where We Stand: a Decade of World City Research[R]. Knox P. L.& Taylor P. J. ,WorldCities in a World System, Cambridge:Cambridge University Press, 1995.
