BrownPenelopeLevinsonStephen C. 1987. Politeness: Some universals in language usage. Cambridge: Cambridge University Press.
2.
IdeSachiko. 1989. Formal forms and discernment: Two neglected aspects of universals of linguistic politeness. Multilingua: Journal of Cross-Cultural and Interlanguage Communication8(2-3). 223-248.
3.
ThomasKeith. 2018. In pursuit of civility: Manners and civilization in early modern England. New Haven, CT: Yale University Press.