“MENINGKATKAN KEMAMPUAN PEMAHAMAN MATEMATIS SISWA MELALUI MODEL PROBLEM BASED LEARNING (PBL) (Penelitian Quasi Eksperimen terhadap Siswa SMP Negeri 1 Tambakdahan)”, Biormatika, vol. 3, no. 01, p. 1, Apr. 2017, Accessed: Jun. 22, 2026. [Online]. Available: https://ejournal.unsub.ac.id/index.php/FKIP/article/view/6