Joseph, Halima, and Kagoya M. Sumaya. “Role of Qualitative Research in Preventing Customer Churn: A Case Study of Mobile Network Operators in Kenya”. Operations Research Society of Eastern Africa 7, no. 2 (December 31, 2017): 13-27. Accessed March 29, 2024. https://orseajournal.udsm.ac.tz/index.php/orsea/article/view/63.