RIDHA, Nikmatur. Proses Penelitian, Masalah, Variabel dan Paradigma Penelitian. Hikmah, [S. l.], v. 14, n. 1, p. 62–70, 2020. Disponível em: https://e-jurnal.staisumatera-medan.ac.id/index.php/hikmah/article/view/18. Acesso em: 22 jan. 2025.