Al Karim DS, Asmin A, Sitompul P. Development of HOTS Problem Based Learning Model Learning Tools to Improve Students’ Critical Thinking Skills and Self-Efficacy. j. perspekt. [Internet]. 2024 Aug. 27 [cited 2025 Aug. 23];8(2):161-7. Available from: https://perspektif.uinsgd.ac.id/index.php/JP/article/view/302