S. Hidayat and O. A. . Josiah, “Experimental Study: The Effect of Problem-Based Learning on Students’ Chemistry Learning Outcomes in Thermochemistry Concepts”, Jor. Chem. Lea. Inn, vol. 3, no. 1, pp. 84–91, Apr. 2026, doi: 10.37251/jocli.v3i1.2996.