AMALIYAH, Salwa.
 Peningkatan Keaktifan Peserta Didik Kelas IX SMP Dengan Penerapan Model Problem Based Learning (PBL) Pada Materi Bangun Ruang Sisi Lengkung.
<strong>Postulat :  Jurnal Inovasi Pendidikan Matematika</strong>, [S.l.], v. 3, n. 1, p. 50-60, july 2022.
ISSN 2723-0600.
Available at: &lt;<a href="https://journal.umg.ac.id/index.php/postulat/article/view/4316" target="_new">https://journal.umg.ac.id/index.php/postulat/article/view/4316</a>&gt;. Date accessed: 20 apr. 2024.
doi: <a href="http://dx.doi.org/10.30587/postulat.v3i1.4316">http://dx.doi.org/10.30587/postulat.v3i1.4316</a>.