Khaidir, Christina. “EFEKTIVITAS BUKU AJAR METODE NUMERIK BERBASIS KONSTRUKTIVISME DI IAIN BATUSANGKAR”. Jurnal Saintika Unpam : Jurnal Sains dan Matematika Unpam 2, no. 2 (October 3, 2019): 109–114. Accessed February 3, 2026. https://openjournal.unpam.ac.id/index.php/jsmu/article/view/3321.