HONNI, Honni. Rancang Bangun Perangkat Lunak Billing dan Implementasi Voice Over Internet Protocol. ComTech: Computer, Mathematics and Engineering Applications, [S. l.], v. 4, n. 2, p. 603–611, 2013. DOI: 10.21512/comtech.v4i2.2483. Disponível em: https://journal.binus.ac.id/index.php/comtech/article/view/2483. Acesso em: 13 may. 2025.