“PENERAPAN MODEL PEMBELAJARAN PROBLEM BASED LEARNING UNTUK MENINGKATKAN HASIL BELAJAR PESERTA DIDIK MATA PELAJARAN MATEMATIKA SMP NEGERI 13 SURABAYA”. Journal of Mathematics Education Research 2, no. 1 (July 31, 2023): 17–22. Accessed November 22, 2024. https://journalng.uwks.ac.id/jmer/article/view/93.