Siwawa, Dumiso, and Mukelabai Mukelabai. “Assessing The Efficiency of Procurement-To-Pay Systems In Zambia’s Nonprofit Organizations: A Case Study of Catholic Relief Services Zambia (CRS)”. African Journal of Commercial Studies, vol. 6, no. 1, Mar. 2025, pp. 147–157 , https://doi.org/10.59413/ajocs/v6.i.1.12.