Omogbiya, S. O. “Imperatives of Effective Management of Customers’ Relationship Marketing for Efficient Operations in Industrial Marketing Organizations in Delta State, Nigeria”. International Journal of Economic Development Research and Investment (IJEDRI) 4, no. 1 (April 1, 2013): 102–106. Accessed November 24, 2024. http://icidr.org.ng/index.php/Ijedri/article/view/831.