6Morgan R M, Shelby D H. The commitment-- trust theory of relationship marketing[J]. Journal of Mar- keting, 1994,58 : 20-- 38.
7Berry L L. Relationship marketing[C]//In L. L. Ber- ry et al(Eds). Emerging Perspectives of Services Mar- keting. Chicago: American Marketing Association, 1983:25--38.
8Jackson B. Winning and keeping industrial customers [ M]. Lexington, MA: Lexington Books, 1985 : 31 -- 67.
10Gronroos C. Value Driven Relational Marketing: from Products to Resource and Competences[J]. Journal of Marketing Management, 1997,13(3) : 407 -- 420.
