ALFATH J. PENINGKATAN MOTIVASI BELAJAR PESERTA DIDIK MELALUI PROBLEM BASED LEARNING PATA MATA PELAJARAN BIOLOGI KELAS X SMAN 1 KETUNGAU HULU. Secondary J. Inov. Pendidik. Menengah [Internet]. 2023Feb.21 [cited 2026Feb.11];3(1):47-53. Available from: https://www.jurnalp4i.com/index.php/secondary/article/view/1943