Zikwan, M. “Kontribusi Pemikiran Ekonomi Syari’Ah Di Abad Ke 5-11 M Dalam Aktivitas Perekonomian Di Indonesia”. Proceedings of Annual Conference for Muslim Scholars, Vol. 3, no. 1, Nov. 2019, pp. 886-93, http://proceedings.kopertais4.or.id/index.php/ancoms/article/view/303.