Bakri, Fauzi, Sunaryo Sunaryo, Velinda Finka Irawan, and Dewi Muliyati. “E-Learning Model for Problem Based Learning on Heat and Thermodynamic Topics in High School”. Jurnal Penelitian & Pengembangan Pendidikan Fisika 4, no. 2 (December 31, 2018): 101 - 112. Accessed April 23, 2024. https://journal.unj.ac.id/unj/index.php/jpppf/article/view/9497.