2021. Effect Self Help Group On Coping Mechanism Focused Problem Coping In Adolescents SMK Negeri Kediri. Jurnal Penelitian Sekolah Tinggi Ilmu Kesehatan Nahdlatul Ulama Tuban. 2, 2 (Jan. 2021). DOI:https://doi.org/10.47710/jp.v2i2.62.