Hamid, A. M., A. F. Rozi, and S. N. Mahmudah. “Islamic Economic Advantages and The Law No. 5 of 1999 in Preventing Monopoly Practices”. Enrichment : Journal of Management, Vol. 11, no. 1, Novembe, Nov. 2020, pp. 122-7, doi:10.35335/enrichment.v11i1, Novembe.47.