Abdullahi-Idiagbon, M. S. “A Critical Appraisal of Concepts and Controversies”. Àgídìgbo: ABUAD Journal of the Humanities 1, no. 1 (May 10, 2013): 1–9. Accessed February 6, 2026. http://journals.abuad.edu.ng/agidigbo/article/view/542.