NASUTION, L. M. Dasar Statistika. Al-Fikru: Jurnal Ilmiah, [S. l.], v. 13, n. 2, p. 141–145, 2021. DOI: 10.51672/alfikru.v13i2.18. Disponível em: https://jurnal.staiserdanglubukpakam.ac.id/index.php/alfikru/article/view/18. Acesso em: 30 apr. 2025.