Munawwarah, Munawwarah, and Sumiati Side. 2022. “Analysis of Students’ Learning Difficulties in Physical Chemistry: Perspective on Various Sub-Variable”. Jurnal Akademika Kimia 11 (4). Palu, Sulawesi Tengah - INDONESIA:219-24. https://jurnalfkipuntad.com/index.php/jak/article/view/2528.