Setiani, A., Setyowani, N. and Kurniawan, K. 1. Meningkatkan Konsentrasi Belajar Melalui Layanan Bimbingan Kelompok. Indonesian Journal of Guidance and Counseling: Theory and Application. 3, 1 (1). DOI:https://doi.org/10.15294/ijgc.v3i1.3751.