Sukarti, Sri, Kusnarto Kurniawan, and Mulawarman Mulawarman. “Mengurangi Bullying Verbal Melalui Konseling Kelompok Dengan Teknik Kontrak Perilaku”. Indonesian Journal of Guidance and Counseling: Theory and Application 7, no. 1 (March 27, 2018). Accessed November 22, 2024. https://journal.unnes.ac.id/sju/jbk/article/view/18263.