Simorangkir, Agustina, and Eli Rohaeti. “Fostering Confidence in Chemistry: How Problem-Based Learning Elevates Self-Efficacy”. Jurnal Pendidikan Matematika dan Sains 13, no. 1 (June 4, 2025): 198–206. Accessed June 7, 2025. https://journal.uny.ac.id/index.php/jpms/article/view/84437.