MUSVA, Nurul Lestari; ERNA, Maria; ABDULLAH, Abdullah. The Effectiveness of Problem-Based Flipped Classroom Model in Improving Chemistry Learning Outcomes of Buffer Solution. Hydrogen: Jurnal Kependidikan Kimia, [S. l.], v. 11, n. 1, p. 34–39, 2023. DOI: 10.33394/hjkk.v11i1.6213. Disponível em: https://e-journal3.undikma.ac.id/index.php/hydrogen/article/view/6213. Acesso em: 16 aug. 2025.