“Pengembangan Perangkat Pembelajaran Matematika Model Pembelajaran Berbasis Masalah Untuk Meningkatkan Kualitas Proses Dan Hasil Belajar Di SMP: Developing of Mathematics Learning Devices With Problem Based Learning Model to Improve Process Quality and Learning Outcomes of Junior High School”. Talenta Conference Series: Science and Technology (ST) 2, no. 2 (July 31, 2019). Accessed May 1, 2026. https://talentaconfseries.usu.ac.id/index.php/st/article/view/544.