Nurwahyuni N, Virgianti SH, Afadil A. Identification of Students’ Concept Understanding and Self-Efficacy in Atomic Structure and Periodic System. ME [Internet]. 2023May31 [cited 2024Dec.3];19(1):90-5. Available from: https://jurnalfkipuntad.com/index.php/jme/article/view/1083