Udo, E. J., Uto, N. P., Anieting, A. E., Ezugwu, V. O. and Inyang, E. J. (2026) “The contribution of some revenue sources to the total expenditure of an oil-producing state in Nigeria”, World Journal of Applied Science & Technology, 18(1), pp. 79–83. Available at: https://www.ajol.info/index.php/wojast/article/view/334339 (Accessed: 11 October 2026).