ASTAMI, T. S. Mistakes in using Keigo on Japanese Busines Correspondence Subject. Lingua Cultura, [S. l.], v. 3, n. 2, p. 183 - 193, 2009. DOI: 10.21512/lc.v3i2.345. Disponível em: https://journal.binus.ac.id/index.php/Lingua/article/view/345. Acesso em: 31 mar. 2025.