“QR Code Based Module Development to Improve students’ Learning Interest in Quadratifical Equations in Class Ix Mts Nurul Huda Bercak Asri Cermee Bondowoso: Pengembangan Modul Berbasis Qr Code”. Jurnal Mercumatika : Jurnal Penelitian Matematika dan Pendidikan Matematika 8, no. 2 (April 25, 2025). Accessed June 30, 2026. https://ejurnal.mercubuana-yogya.ac.id/index.php/mercumatika/article/view/4272.