VIOLENCE PREVENTION IN PUBLIC MIDDLE SCHOOLS IN BONTANG CITY USING CHI SIGMA IOTA-BASED LEADERSHIP AND ADVOCACY. jbkb [Internet]. 2026 Jun. 30 [cited 2026 Sep. 21];8(1):57-66. Available from: https://jurnal.ubt.ac.id/index.php/jbkb/article/view/776