Anggraini Masnur, A. D., M. E. Wibowo, and E. Purwanto. “The Effectiveness of CBT Group Counseling With Self-Instruction Technique to Improve Students’ Self-Efficacy”. Jurnal Bimbingan Konseling, Vol. 11, no. 1, Apr. 2022, pp. 23-29, doi:10.15294/jubk.v11i1.55698.