Hendriayana, Ari, Sri E.S., and Siti Miswadi. “PENGEMBANGAN SOFTWARE PEMBELAJARAN MANDIRI (SPM) MATERI SISTEM PERIODIK UNSUR DAN STRUKTUR ATOM”. Journal of Innovative Science Education 2, no. 1 (1). Accessed January 22, 2025. https://journal.unnes.ac.id/sju/jise/article/view/1291.