Agung Sarmatheo, C., Syam, M. and Zulkarnaen 2020. Efektivitas Model Problem Based Learning (PBL) terhadap Problem Solving Skill dan Penguasaan Konsep Kalor . Jurnal Literasi Pendidikan Fisika (JLPF). 1, 02 (Nov. 2020), 165 - 173. DOI:https://doi.org/10.30872/jlpf.v1i02.190.