NUGRAHA, Ahmad Lukman. Islamic Business Ethics and Islamic Microfinance in Pesantren Gontor. Shirkah: Journal of Economics and Business, [S. l.], v. 2, n. 1, 2018. DOI: 10.22515/shirkah.v2i1.28. Disponível em: https://shirkah.or.id/new-ojs/index.php/home/article/view/28. Acesso em: 22 jan. 2025.