Nurhadi, Nurhadi. “THE TUBE HADIS STUDY ABOUT MONOPOLY IN BUSINESS ECONOMY”. International Journal of Economics, Business and Accounting Research (IJEBAR) 2, no. 04 (December 30, 2018). Accessed September 11, 2025. https://jurnal.stie-aas.ac.id/index.php/IJEBAR/article/view/348.