Sari, Lala, Eny Enawaty, and Rachmat Sahputra. “Analysis of Students’ Learning Difficulties in Science on the Topic of Additive Substances at Junior High School”. Hydrogen: Jurnal Kependidikan Kimia 13, no. 4 (September 29, 2025). Accessed September 30, 2025. https://ojspanel.undikma.ac.id/index.php/hydrogen/article/view/17120.