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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. IJSET [Internet]. 2026 Apr. 26 [cited 2026 Apr. 26];5(4):2586-91. Available from: https://www.ijset.org/index.php/ijset/article/view/1818