Wahyuni, Tri, Syutaridho Syutaridho, and Arvin Efriani. “The Effect of Implementing the PBL Model on Students’ Problem-Solving Abilities in Middle School”. Edumatica : Jurnal Pendidikan Matematika 13, no. 3 (December 31, 2023): 247–257. Accessed April 22, 2026. https://www.online-journal.unja.ac.id/edumatica/article/view/28953.