Novriansyah, Dicky, Edy Purwanto, and Mungin Eddy Wibowo. 2019. “The Effectiveness of Solution-Focused Brief Therapy Group Counseling to Improve Students’ Self-Concepts”. Jurnal Bimbingan Konseling 8 (4), 130-36. https://journal.unnes.ac.id/sju/jubk/article/view/31343.