1Daniels P W.Servicgs Industries:A Geographical Appraisal[M].London:Methuen,1985.1-16.
2Marshall J N,Damesick P,Wood P.Understanding the location and role of producer services in the United Kingdom f1].Environment and Planning A,1987,19(5):575-595.
3Beyers W.Producer Services[J].Progress in Human Geography,1992,16(4):573-583.
4Coffey W J.Producer services research in Canada[J].Professional Geography,1995,47(1):74-81.
5Daniels P W.The geography of services[J].Progress in Human Ge-ography,1985,9(3):443-456.
6Daniels P W.Service Industries in The World Economy[M].Oxford:Blackwell Publishers,1993.25-75.
7O'Connor K,Daniels P W.The Geography of International Trade in Services:Australia and the APEC Region[J].Environment and Plan-ning A,2001,33(2):281-296.
8Harrington J W.Implications of the Canada-United States Free Trade Agreement for Regional Provision of Producer Services[J].Econom-ic Geography,1989,65(4):314-328.
9Illeris S.The role of services in regional and urban development:a reappraisal of our understanding[J].The Service Industries Journal,2005,25(4):447-460.