Aprilia R, Zetriuslita Z, Ariawan R, Angraini LM. Development of Learning Devices with Problem Based Learning Model on Statistics Material for Class VIII SMP. Perspektif [Internet]. 2022 Apr. 28 [cited 2024 May 4];13(1):21-7. Available from: https://journal.uir.ac.id/index.php/Perspektif/article/view/9374