حطاب كمال توفيق. “Khattab, Kamal Tawfiq. ‘Ibn Khaldūn and Western Economic Thought,’ Year 13, Issue 51 (Winter 1429 AH 2008 CE), Pp. 285-308”. Al-Fikr Al-islāmī Al-muʿāṣir (previously Islamiyat Al-Ma’rifah), vol. 13, no. 51, Jan. 2008, pp. 285-08, doi:10.35632/citj.v13i51.1225.