Simanungkalit, Ate Gueen, and Regina Octavia Muhaling. “Mental Health Problems and English Achievement of UNKLAB High School Students”. SUMIKOLAH: Jurnal Ilmu Pendidikan 1, no. 1 (January 10, 2023): 1–12. Accessed December 7, 2025. https://ejournal.unklab.ac.id/index.php/sumikolah/article/view/867.