Gamariel, D. M. ., and O. . Tuyisenge. “Material Handling and Material Sourcing On Organizational Profitability a Case of Urwibutso Enterprise Ltd”. Social Science Learning Education Journal, vol. 6, no. 10, Oct. 2021, pp. 634-41, https://sslej.in/index.php/sslej/article/view/3500.