Krishnakumar Jayachadran. “The Impact of CRM and ECRM on Customer Retention and Profitability”. International Journal of Computer Science and Information Technology Research 3, no. 1 (December 7, 2022): 29–36. Accessed January 29, 2026. https://ijcsitr.org/index.php/home/article/view/IJCSITR_2022_03_01_05.