Elijah E. B. Menga, and Dr. Simon Nyakwara. “Influence Of Product Quality Differentiation Strategies On Client Retention In Kenya Commercial Bank Kisii Central Sub-County, Kenya”. IJRDO - Journal of Business Management, Vol. 6, no. 11, Dec. 2020, pp. 41-49, doi:10.53555/bm.v6i11.4007.