SANTOSO, Dian Rahma. Buku Ajar Business English. Umsida Press, [S. l.], p. 1–176, 2021. DOI: 10.21070/2017/978-979-3401-57-7. Disponível em: https://press.umsida.ac.id/index.php/umsidapress/article/view/978-979-3401-57-7. Acesso em: 21 jun. 2025.