Susilowati AT. Analisis Efektifitas Pembelajaran Problem Based Learning Terhadap Hasil Belajar Kognitif Siswa Kelas IV SD. JPDK [Internet]. 2021Aug.31 [cited 2024May3];3(2):133-7. Available from: http://journal.universitaspahlawan.ac.id/index.php/jpdk/article/view/1880