Nicholson, Michael. “The Impact of the Private Provision of WASH Services on Sustainable Economic Growth in Sub-Saharan Africa”. Advances in Social Sciences Research Journal 6, no. 12 (January 2, 2020): 181–189. Accessed December 7, 2025. https://www.journals.scholarpublishing.org/index.php/ASSRJ/article/view/7078.