Imbuga, A., and D. W. Guyo. “INFLUENCE OF FLEET MANAGEMENT OUTSOURCING ON SERVICE DELIVERY PERFORMANCE IN NAIROBI BOTTLERS LIMITED”. International Journal of Supply Chain Management, vol. 3, no. 1, May 2018, pp. 46 -59, https://www.iprjb.org/journals/index.php/IJSCM/article/view/625.