Mbithi, W. “Challenges of Customer Retention in the Kenyan Banking Sector: A Case Study of KCB Treasury Square Branch, Mombasa”. International Journal of Sciences: Basic and Applied Research (IJSBAR), vol. 12, no. 1, Nov. 2013, pp. 124-32, https://gssrr.org/index.php/JournalOfBasicAndApplied/article/view/1278.