Bakri, F., Sunaryo, S., Irawan, V.F. and Muliyati, D. 2018. E-Learning Model for Problem Based Learning on Heat and Thermodynamic Topics in High School. Jurnal Penelitian & Pengembangan Pendidikan Fisika. 4, 2 (Dec. 2018), 101 - 112. DOI:https://doi.org/10.21009/1.04207.