YENTI, I. N. PENGEMBANGAN BAHAN AJAR KALKULUS PEUBAH BANYAK 1 (KPB 1) BERBASIS E-LEARNING. Ta’dib, [S. l.], v. 13, n. 2, 2016. DOI: 10.31958/jt.v13i2.181. Disponível em: https://ejournal.uinmybatusangkar.ac.id/ojs/index.php/takdib/article/view/181. Acesso em: 20 jan. 2026.