Kalu, Alexanda Ogbonna Udu, et al. “Electronic Customer Relationship Management and Consumer Behaviour: A Study of Diamond Bank PLC, Nigeria”. Singaporean Journal of Business Economics and Management, vol. 6, no. (8), Aug. 2018, pp. 43-56, https://www.singaporeanjbem.com/index.php/SJBEM/article/view/449.