Chandra, Evi, Mungin Wibowo, and Sunawan Sunawan. “Cognitive Behaviour Group Counseling With Self-Instruction and Cognitive Restructuring Techniques to Improve Students’ Self-Confidence”. Islamic Guidance and Counseling Journal 2, no. 1 (January 30, 2019): 11-17. Accessed July 11, 2020. https://journal.iaimnumetrolampung.ac.id/index.php/igcj/article/view/305.