5Cohen, R B. 1981.“The New International Division of Labor, Multinational Corporations and Urban Hierarehy”. In Urbanisation and Urban planning in Capitalist Soeiety, ed M dear and Seott, pp287-315,Methuen, London.
6Gillespie, A. E. and A. E. Green. 1987. “The changing geography of producer services employment in Britain”, Regional Studies 21: 397-411.
7Goe, W. R. 1991.“The Growth of Producer Services Industries: Sorting Through the Externalization Debate.” Growth and Change 22: 118-41.