Doyan, Aris, Ahmad Harjono, and Moammar Qadafi. “Trends Research Project Based Learning (PjBL) Model to Improve Problem Solving Skills in Students’ Science Learning (2015-2024): A Systematic Review”. Jurnal Penelitian Pendidikan IPA 10, no. 7 (July 25, 2024): 498–507. Accessed August 4, 2024. https://jppipa.unram.ac.id/index.php/jppipa/article/view/8280.