Setiani, Amalia, Ninik Setyowani, and Kusnarto Kurniawan. 1. “Meningkatkan Konsentrasi Belajar Melalui Layanan Bimbingan Kelompok”. Indonesian Journal of Guidance and Counseling: Theory and Application 3 (1). https://doi.org/10.15294/ijgc.v3i1.3751.