Nafisa Tasnim, and Md. Sazzad Hossain Patwary. “Analyzing Customer Service Quality of State-Owned Commercial Banks in Bangladesh: A Study on Sonali Bank Limited”. Global Journal of Management and Business Research, vol. 22, no. E2, June 2022, pp. 31-38, https://journalofbusiness.org/index.php/GJMBR/article/view/102209.