Olomu Babatunde Olukayode, Adewumi Eyitayo Folasade (Ph.D), and Alao Oladimeji David (Ph.D). “NIGERIA CUSTOMS SERVICE, SOURCES OF INTELLIGENCE AND BORDER SECURITY”. Singaporean Journal of Business Economics and Management 6, no. (10) (October 31, 2018): 48–56. Accessed May 21, 2026. https://www.singaporeanjbem.com/index.php/SJBEM/article/view/461.