A. Doyan, A. Harjono, and M. Qadafi, “Trends Research Project Based Learning (PjBL) Model to Improve Problem Solving Skills in Students’ Science Learning (2015-2024): A Systematic Review”, jppipa, pendidikan ipa, fisika, biologi, kimia, vol. 10, no. 7, pp. 498–507, Jul. 2024.