Rafindadi AA, Olanrewaju ZA. Internal Control System, Sustainable Management and Service Delivery of NGO’s in Nigeria: An Empirical Analysis. IRMM [Internet]. 2019 Mar. 6 [cited 2024 Apr. 28];9(2):89-103. Available from: https://econjournals.com/index.php/irmm/article/view/7773