Wajdi, M. B. “Monopoli Dagang Dalam Kajian Fiqih Islam”. At-Tahdzib: Jurnal Studi Islam Dan Muamalah, Vol. 4, no. 2, Oct. 2016, pp. 81-99, http://ejournal.kopertais4.or.id/mataraman/index.php/tahdzib/article/view/2369. Accessed 15 Oct. 2019.