YULIANA Y. PENINGKATAN HASIL BELAJAR MATEMATIKA MELALUI PEMBELAJARAN PROBLEM BASED LEARNING BERBASIS MASALAH KONTEKSTUAL SISWA KELAS X SMA NEGERI 2 MALINAU . ACTION [Internet]. 2023Jun.15 [cited 2025Jan.11];3(2):157-65. Available from: https://jurnalp4i.com/index.php/action/article/view/2254