LESTARI, R. U. I.; UNTARI, R. S. Open Problem Based Learning (OPBL) Learning Model on Student Learning Outcomes in Operating System Lessons At Vocational High School: Model Pembelajaran Open Problem Based Learning (OPBL) Terhadap Hasil Belajar Siswa Pada Mata Pelajaran Sistem Operasi di SMK. Academia Open, [S. l.], v. 4, p. 10.21070/acopen.4.2021.3069, 2021. DOI: 10.21070/acopen.4.2021.3069. Disponível em: https://acopen.umsida.ac.id/index.php/acopen/article/view/3069. Acesso em: 3 sep. 2025.