ABRAR, M.; NASUTION, M. I. P. Analisis Peningkatan Keamanan Data Two Step Verification pada Aplikasi Whatsapp Messenger. Surplus: Jurnal Ekonomi dan Bisnis, [S. l.], v. 2, n. 2, p. 335–340, 2024. Disponível em: https://yptb.org/index.php/sur/article/view/836. Acesso em: 10 feb. 2026.