SULASTRI, T. IMPLEMENTATION OF INTERNAL QUALITY ASSURANCE SYSTEMS IN IMPROVING THE QUALITY OF EDUCATION SERVICES: Research at the SPMI Model School SD Darul Hikam 2 Bandung Regency and SDN 200 Leuwipanjang Bandung City. Al-Hasanah : Jurnal Pendidikan Agama Islam, [S. l.], v. 5, n. 2, p. 53–60, 2020. DOI: 10.51729/5211. Disponível em: https://jurnal.staip.ac.id/index.php/hasanah/article/view/11. Acesso em: 27 feb. 2026.