Nurhanifah, Utari, et al. “EFFECTIVENESS OF GROUP WORK USING POSITIVE REINFORCEMENT TO REDUCE OFF-TASK BEHAVIOR IN GRADE XI STUDENTS”. Jurnal Bikotetik (Bimbingan Dan Konseling: Teori Dan Praktik), vol. 9, no. 2, Nov. 2025, pp. 255-63, doi:10.26740/bikotetik.v9n2.p255-263.