Al Karim, Dini Safitri, Asmin Asmin, and Pardomuan Sitompul. “Development of HOTS Problem Based Learning Model Learning Tools to Improve Students’ Critical Thinking Skills and Self-Efficacy”. Jurnal Perspektif 8, no. 2 (August 27, 2024): 161–171. Accessed July 1, 2025. http://perspektif.uinsgd.ac.id/index.php/JP/article/view/302.