Sari L, Enawaty E, Sahputra R. Analysis of Students’ Learning Difficulties in Science on the Topic of Additive Substances at Junior High School. HJKK [Internet]. 2025 Sep. 29 [cited 2025 Sep. 30];13(4). Available from: https://ojspanel.undikma.ac.id/index.php/hydrogen/article/view/17120