MARTA, Eni.
 Implementasi Pengembangan Bahan Ajar Menggunakan Model Problem Based Learning Terhadap Aktivitas Siswa Di Kelas V Sekolah Dasar.
<strong>Indonesian Journal of Basic Education</strong>, [S.l.], v. 1, n. 3, p. 291 - 295, mar. 2019.
ISSN 2615-8523.
Available at: &lt;<a href="https://e-jurnal.stkiprokania.ac.id/index.php/IJOBE/article/view/208" target="_new">https://e-jurnal.stkiprokania.ac.id/index.php/IJOBE/article/view/208</a>&gt;. Date accessed: 16 dec. 2025.