IMARA, Salsabila Yulia; RUSMINI. Validity of the Corporate Edition Flip PDF Assisted Learning E-Module for Improving Students’ Critical Thinking Skills. Hydrogen: Jurnal Kependidikan Kimia, [S. l.], v. 13, n. 4, p. 751–765, 2025. DOI: 10.33394/hjkk.v13i4.16830. Disponível em: https://e-journal.undikma.ac.id/index.php/hydrogen/article/view/16830. Acesso em: 12 oct. 2025.