Aprilia, Riska, Zetriuslita Zetriuslita, Rezi Ariawan, and Lilis Marina Angraini. “Development of Learning Devices With Problem Based Learning Model on Statistics Material for Class VIII SMP”. Perspektif Pendidikan dan Keguruan 13, no. 1 (April 28, 2022): 21–27. Accessed May 4, 2024. https://journal.uir.ac.id/index.php/Perspektif/article/view/9374.