Duc-Harada, Patrycja, Dariusz Głuch, и Senri Sonoyama, ред. «Changes and Modifications Occurring in the Category of Japanese Politeness». в Japanese Civilization: Tokens and Manifestations. Poland: Księgarnia Akademicka Publishing, 2019. просмотрено ноябрь 5, 2026. https://books.akademicka.pl/publishing/catalog/book/21/chapter/22.