Oparah Promise Chika, Iloanya Kenneth Okechukwu, and Ugochukwu Marius Ndubuisi. “Education Expenditure and Human Capital Development in Nigeria”. American Journal of Economics and Business Management 6, no. 9 (September 10, 2023): 37–47. Accessed July 12, 2025. https://www.globalresearchnetwork.us/index.php/ajebm/article/view/2427.