DEFISAH, Afy; HERIANSYAH, Masnurimma; IRAWAN, Andi Wahyu; KURNIAWAN, Dydik; PRATIWI, Yasintha Sari. The Contribution of Group Guidance Services to Increasing the Study Concentration of Class X Students at SMA Negeri 3 Samarinda 2020/2021. Educational Studies: Conference Series, [S. l.], v. 1, n. 1, p. 139–144, 2021. DOI: 10.30872/escs.v1i1.860. Disponível em: https://jurnal.fkip.unmul.ac.id/index.php/escs/article/view/860. Acesso em: 1 apr. 2026.