NUGRAHA, Ahmad Lukman. Islamic Business Ethics and Islamic Microfinance in Pesantren Gontor. Shirkah: Journal of Economics and Business, [S.l.], v. 2, n. 1, jan. 2018. ISSN 2503-4243. Available at: <http://shirkah.or.id/new-ojs/index.php/home/article/view/28>. Date accessed: 23 oct. 2019. doi:http://dx.doi.org/10.22515/shirkah.v2i1.28.