Ochwangi Mengo and Dr. Simon Nyakwara 2020. Influence of Product Quality Differentiation Strategies on Client Sustenance in Barclays Bank-Kisii Branch, Kenya. IJRDO - Journal of Business Management. 6, 11 (Dec. 2020), 31-40. DOI:https://doi.org/10.53555/bm.v6i11.3865.