Juniarti ND, Renda NT. PENERAPAN MODEL PROBLEM SOLVING UNTUK MENINGKATKAN HASIL BELAJAR MATEMATIKA. JIPPG [Internet]. 2018 Dec. 21 [cited 2024 Dec. 2];1(2):155-63. Available from: https://ejournal.undiksha.ac.id/index.php/JIPPG/article/view/16396