Khoiriyah, Z., Puji Sugiharto, D.Y. and Japar, M. 2020. The Effectiveness of Group Counseling with Self-instruction and Cognitive Restructuring Techniques to Improve Hardiness. Jurnal Bimbingan Konseling. 9, 3 (Aug. 2020), 152-157. DOI:https://doi.org/10.15294/jubk.v9i3.43118.