Efforts to improve self-concept with adolescent therapeutic group therapy (TKT) and assertive training (AT) for 7th grade students at SMP Negeri 20 Pekanbaru City. Community Empower [Internet]. 2022 Aug. 23 [cited 2026 Sep. 30];7(8):1304-11. Available from: https://coba.unimma.ac.id/ce/article/view/6581