Relasi keluarga dan kelompok pertemanan dalam perilaku kekerasan remaja studi kasus : pelaku kekerasan di rumah perlindungan sosial anak, Bambu Apus = The Relation between family and peer group in adolescents as perpetrators of violence case study adolescents as perpetrators of violence in Rumah Perlindungan Sosial Anak Bambu Apus