Sitorus, Catherine.S.Lorentz, and Elfrida Ginting. “ISpring Suite 11-Based Android Media Development for Chemical Bonding Learning”. Hydrogen: Jurnal Kependidikan Kimia 14, no. 5 (October 31, 2026). Accessed November 2, 2026. https://e-journal.undikma.ac.id/index.php/hydrogen/article/view/21317.