Bakri F, Sunaryo S, Irawan VF, Muliyati D. E-Learning Model for Problem Based Learning on Heat and Thermodynamic Topics in High School. jpppf [Internet]. 2018Dec.31 [cited 2024Jul.27];4(2):101 -12. Available from: https://journal.unj.ac.id/unj/index.php/jpppf/article/view/9497