Agustin, Viola Maharani, et al. “The Effect of Problem Based Learning Model on Students’ Conceptual Understanding in Thermodynamics Assisted by PhET Simulator ”. Al-Khazini: Jurnal Pendidikan Fisika, vol. 6, no. 1, Apr. 2026, pp. 25-32, https://journal.uin-alauddin.ac.id/index.php/alkhazini/article/view/60837.