Putri, Fadira, and Nefi Darmayanti. “The Effectiveness of Group Counseling With Assertive Training Techniques in Enhancing Self-Esteem Among Adolescents Victimized by Bullying”. Journal of Educational Sciences 9, no. 5 (September 5, 2025): 3718–3730. Accessed April 27, 2026. https://jes.ejournal.unri.ac.id/index.php/JES/article/view/1096.