T. Dewantari, B. H. Surya, and S. Z. Bulantika, “Group Counseling with Assertive Training Techniques to Self Confidence Adolescents”, j. kependidikan. has. penelit. kaji. kepustakaan. bid. pendidik. pengajaran. n.a., vol. 7, no. 1, pp. 35–41, Mar. 2021.