SIMANUNGKALIT, A. G.; MUHALING, R. O. Mental Health Problems and English Achievement of UNKLAB High School Students. SUMIKOLAH: Jurnal Ilmu Pendidikan, [S. l.], v. 1, n. 1, p. 1–12, 2023. DOI: 10.31154/sjip.v1i1.867.1-12. Disponível em: https://ejournal.unklab.ac.id/index.php/sumikolah/article/view/867. Acesso em: 6 feb. 2026.