Balarabe Garba Yakubu. “The Development of Money and the Monetary System in Africa: Pre-Colonial to Contemporally Period”. LAPAI JOURNAL OF NIGERIA HISTORY 13, no. 1 (February 23, 2021): 38–49. Accessed July 3, 2024. https://ojs.ibbujournals.com.ng/index.php/ljnnhh/article/view/789.