Roots of the wakimae aspect of linguistic politeness 論文集所収 Sachiko Ide ·2012-05-01 ·『John Benjamins Publishing Company eBooks』 pp. 121-138 doi:10.1075/z.170.08ide
Interlanguage Pragmatics: An Introduction 論文集所収 Gabriele Kasper・Shoshana Blum‐Kulka ·1993-08-05 ·pp. 3-18 doi:10.1093/oso/9780195066029.003.0001