SUBANDI, Iga Putri; HIDAYAH, Rusly. Validity of Electronic Student Worksheets to Improve Students’ Metacognitive Skills Through PBL on Petroleum Materials. Hydrogen: Jurnal Kependidikan Kimia, [S. l.], v. 11, n. 4, p. 391–400, 2023. DOI: 10.33394/hjkk.v11i4.8236. Disponível em: https://e-journal3.undikma.ac.id/index.php/hydrogen/article/view/8236. Acesso em: 16 aug. 2025.