HINDARTO. Sistem Digital . Umsida Press, [S. l.], p. 1–119, 2021. DOI: 10.21070/2019/978-602-5914-60-7. Disponível em: https://press.umsida.ac.id/index.php/umsidapress/article/view/978-602-5914-60-7. Acesso em: 27 jun. 2025.