Situmeang, Amanda Zefanya, and Elfrida Ginting. “Difference Model Problem Based Learning (PBL) and Discovery Learning (Dl) on Results Study and Motivation Study Students At Bonding Materials Chemistry in Senior High School”. Jurnal Teknologi Pendidikan : Jurnal Penelitian dan Pengembangan Pembelajaran 9, no. 2 (April 28, 2024): 293–300. Accessed August 16, 2025. https://e-journal3.undikma.ac.id/index.php/jtp/article/view/11202.