UMOFFONG, Nsima J.; UDONSEK, Augustine Afangide. Impact Assessment of Internal Control System on Revenue Generation of Internal Revenue Service (IRS), Akwa Ibom State. International Journal of Economic Development Research and Investment (IJEDRI), [S. l.], v. 10, n. 2, p. 23–31, 2019. Disponível em: http://icidr.org.ng/index.php/Ijedri/article/view/937. Acesso em: 19 sep. 2024.