Piccoli, Gabriele and L. Applegate (2003), "Wyndham International: Fostering High-Touch with High-Tech", Case Study No. 9-803-092, Harvard Business School
2. Nguyen, B. & Mutum, D. S. (2012). A review of customer relationship management: successes, advances, pitfalls and futures, Business Process Management Journal, 18 (3). 400-419
3. Balaram, A., Adhikari, B. (2010), Managing Customer Relationships in Service Organizations. Administration and Management Review, 21(2), 65-78.
4. Greenberg, Paul (2009). CRM at the Speed of Light (4th ed.). McGraw Hill. p. 7
5. Davenport, T.H., Harris, J.G., Kohli, A.K. (2001), "How do they know their customers so well?", MIT Sloan Management Review, Vol. 42 No.2, pp.63-73
6. CRM Trends in Insurance IndustryCRM Trends in Insurance Industry: April, 2010
7. Myron, David. "CRM in Customer Service". DestinationCRM.com. Information Today, Inc. Retrieved 15 October 2014.
8. http://www.ibsaf.org/icfai_books/CRM_Services_Sector-APractical_Approac