Agung Sarmatheo, Chrislay, Muliati Syam, and Zulkarnaen. 2020. “Efektivitas Model Problem Based Learning (PBL) Terhadap Problem Solving Skill Dan Penguasaan Konsep Kalor ”. Jurnal Literasi Pendidikan Fisika 1 (02), 165 -73. https://doi.org/10.30872/jlpf.v1i2.190.