ABDELKADER, Salim Bourchid; M'HAMED, Hamidouche; ZIAN, Abderrazak Ahmed. Concentration and Specialization of Economic Activities in the Kingdom of Saudi Arabia. Shirkah: Journal of Economics and Business, [S.l.], v. 5, n. 3, p. 362-385, dec. 2020. ISSN 2503-4243. Available at: <https://shirkah.or.id/new-ojs/index.php/home/article/view/348>. Date accessed: 30 july 2021. doi:http://dx.doi.org/10.22515/shirkah.v5i3.348.