RUSDIANSYAH, R.; HERLAWATI, H.; SARI, E. P. PERANCANGAN VOICE OVER INTERNET PROTOCOL (VoIP) MENGGUNAKAN VIRTUAL PRIVATE NETWORK (VPN) PADA PT CARE TECHNOLOGIES. Jurnal Techno Nusa Mandiri, [S. l.], v. 10, n. 1, p. 57–64, 2013. Disponível em: https://ejournal.nusamandiri.ac.id/index.php/techno/article/view/560. Acesso em: 31 jan. 2025.