B. M. Idowu, M. C. Arua, C. P. Nwosu, and F. M. Nwankwo, “Slavery in the Contemporary World: An Examination of Modern Slavery in Africa”, Int J Innov Educ Res, vol. 9, no. 8, pp. 181–190, Aug. 2021, doi: 10.31686/ijier.vol9.iss8.3274.