Boulding, William et al. (2005). A Customer Relationship Management Roadmap: What Is Known, Potential Pitfalls, and Where to Go, Journal of Marketing, Vol.69, No.4.
Buttle, Francis and Maklan, Stan. (2017). Customer Relationship Management: Concepts and Technologies, third edition, London: Routledge.
El-Helaly, Nehal, Ebeid, Ahmed and El-Menbawe, Azza. (2015). The Role of Customer Knowledge Management Process in Service Recovery Performance: An Applied Study to the Egyptian National Railways, International Journal of Management and Applied Research, Vol. 2, No. 1.
Foss, Bryan and Stone, Merlin. (2002). CRM in Financial Services: A Practical Guide to Making customer Relationship Management Work, London: Kogan Page Limited.
Gay, L.R. (1992). Educational Research: Competencies for Analysis and Application, 4th Edition, New York: Macmillan Publishing Company.
Karlöf, Bengt & Lövingsson, Fredrik Helin. (2005). The A-Z of Management Concepts and Models, London: Thorogood Publishing.
Laketa, Marko et al. (2015). Customer Relationship Management: Concept and Importance for Banking Sector, UTMS Journal of Economics, Vol.6, No.2.
Marsh, Fraya. W. (2006). Customer Relationship Management. in Helms, Marilyn M. (Ed), Encyclopedia of Management, 5th Edition, New York: Thomson Gale.
Mohammad, Abdul Alem, Bin Rashid Basri and Bin Tahir, Shaharuddin. (2013). Assessing the influence of customer relationship management (CRM) dimensions on organization performance: An Empirical study in the hotel industry, Journal of Hospitality and Tourism Technology, Vol.4, No.3.
Parvatiyar, Atul & Sheth, Jagdish N. (2001). Customer Relationship Management: Emerging Practice, Process, and Discipline, Journal of Economic and Social Research, Vol.3, No.2.
Payne, Adrian and Frow, Pennie. (2005). A Strategic Framework for Customer Relationship Management, Journal of Marketing, Vol.69, No.4.
Payne, Adrian. (2005). Handbook of CRM: Achieving Excellence in Customer Management, London: Elsevier publishing.
Pries, Christina and Stone, Merlin. (2004). Managing CRM Implementation with Consultants—CRM or Change Management, Journal of Change Management, Vol.4, No.4.
Sheth, J. N., Parvatiyar, A., & Sinha, M. (2015). The conceptual foundations of relationship marketing: Review and Synthesis, Journal of Economic Sociology, Vol. 16, No 2.
Smedescu, Dan Alexandru et al. (2017). Marketing Communications Mix in Higher Education Institutions, International Journal of Academic Research in Economics and Management Sciences, Vol. 5, No. 4.
Srivastava, Mallika. (2012). Customer Relationship Management (CRM): A Technology Driven Tool, SAMVAD International Journal of Management, Vol. IV. March.
Statt, David A. (2004). The Routledge Dictionary of Business Management, third Edition, London: Routledge-Taylor&Francis Group.
Sulaiman, Mohd Azizul, Abdullah, Mohd Amli and Ridzuan, Baharum Arifi. (2014). Customer Relationship Management (CRM) Strategies Practices in Malaysia Retailers, Procedia - Social and Behavioral Sciences, Vol.130.
Thamarasseri, Ismail. (2018). Introduction to Educational Research, New Delhi: Wisdom Press.
Tumwine, Sulait& Kamukama, Nixon and Ntayi, Joseph M. (2012). Relational capital and performance of tea manufacturing firms, African Journal of Business Management, Vol.6, No.3, January.
Uncles, Mark D., Dowling, Grahame R. and Hammond, Kathy. (2003). Customer Loyalty and Customer Loyalty Programs, journal of Consumer Marketing, Vol.20, No.4, July.
Vicente, Guerola Navarro et al. (2021). Customer Relationship Management (CRM) and Innovation: A Qualitative Comparative Analysis (QCA) in the Search for Improvements on the Firm Performance in Winery Sector, Journal of Technological Forecasting & Social Change, Vol.169.
Woodcock, Neil and Stone, Merlin. (2012). Simple strategies to win and keep customers profitably, Journal of Database Marketing & Customer Strategy Management, Vol.19, No.4.
Zablah, A.R., Bellenger, D. and Johnston, W.J. (2004). An Evaluation of Divergent Perspectives on Customer Relationship Management: Towards a Common Understanding of an Emerging Phenomenon, Industrial Marketing Management, Vol. 33, No.6.
Zamil, Ahmad M. (2011),Customer Relationship Management: A Strategy to Sustain the Organization's Name and Products in the Customers' Minds,European Journal of Social Sciences, Vol.22, No.3.