HERPINA MARTANGI SIANTURI; WIDYATMIKE GEDE MULAWARMAN; HAERUDDIN; KHUSNUL KHOTIMAH; LAILI KOMARIYAH; NURLAILI. THE PRINCIPAL’S MANAGEMENT IN PREVENTING BULLYING THROUGH THE CHILD-FRIENDLY SCHOOL PROGRAM AT SMP NEGERI 6 SANGATTA UTARA. International Journal of Social Science, Educational, Economics, Agriculture Research and Technology (IJSET), [S. l.], v. 5, n. 4, p. 2586–2591, 2026. Disponível em: https://ijset.org/index.php/ijset/article/view/1818. Acesso em: 26 apr. 2026.