Alyusfitri, Rieke. “PENINGKATAN KEMAMPUAN PENALARAN MATEMATIKA SISWA MELALUI MODEL PROBLEM BASED INSTRUCTIONAL (PBI)”. PAKAR Pendidikan 15, no. 1 (January 6, 2017): 39-52. Accessed July 3, 2024. http://pakar.pkm.unp.ac.id/index.php/pakar/article/view/52.