Naibaho, Tutiarny. “Pengaruh Model ProblemBased Learning (PBL) Terhadap Kemampuan Pemecahan Masalah Matematis”. Derajat 1, no. 1 (April 30, 2024): 30-37. Accessed November 23, 2024. https://jurnal.uhn.ac.id/index.php/derajat/article/view/1536.