WULAN NURMAFIROCH H. Efektifitas Penerapan Problem Based Learning Pada Hasil Belajar Siswa Materi Mengelola Kartu Utang. JPAK [Internet]. 25Aug.2014 [cited 19May2024];2(2). Available from: https://ejournal.unesa.ac.id/index.php/jpak/article/view/9425