Risvayani, Risvayani, A Permanasari, and I Musthafa. “Preliminary Research: Identification of Difficulty in Chemical Learning Based On Teacher and Student Perspectives ”. JISAE: Journal of Indonesian Student Assessment and Evaluation 9, no. 2 (November 5, 2023): 171 - 179. Accessed July 8, 2024. https://journal.unj.ac.id/unj/index.php/jisae/article/view/39931.