Tangaza, M. A., T. Muhammad, A. Muhammed, and A. Bala. “Conceptual Analysis of Customer Relationship Management (CRM) Definitions and Its Implication on CRM Implementation on Developing Country Context”. The International Journal of Business & Management, vol. 5, no. 12, Dec. 2017, https://internationaljournalcorner.com/index.php/theijbm/article/view/125736.