JALIL, Abdul. Alumni Networks and Economic Reinforcement in Pesantren Ummussabri. Shirkah: Journal of Economics and Business, [S. l.], v. 4, n. 2, 2019. DOI: 10.22515/shirkah.v4i2.268. Disponível em: https://shirkah.or.id/new-ojs/index.php/home/article/view/268. Acesso em: 24 jan. 2025.