SIREGAR, Nia Ramadhani; DIBYANTINI, Ratu Evina. Implementation of Problem-Based High School Chemistry Textbooks on Improving Student Learning Outcomes and Motivation on Acid-Base Subject Materials. Hydrogen: Jurnal Kependidikan Kimia, [S. l.], v. 14, n. 4, 2026. DOI: 10.33394/hjkk.v14i4.20676. Disponível em: https://e-journal.undikma.ac.id/index.php/hydrogen/article/view/20676. Acesso em: 8 sep. 2026.