PENERAPAN MODEL PEMBELAJARAN PROBLEM BASED LEARNING UNTUK MENINGKATKAN HASIL BELAJAR PESERTA DIDIK MATA PELAJARAN MATEMATIKA SMP NEGERI 13 SURABAYA. Journal of Mathematics Education Research, [S. l.], v. 2, n. 1, p. 17–22, 2023. Disponível em: https://journalng.uwks.ac.id/jmer/article/view/93.. Acesso em: 8 sep. 2024.