Politeness: Some Universals in Language Usage (Studies in Interactional Sociolinguistics 4)
It has continued to inspire empirical work as 'the' source on politeness and, more generally, as an important exemplar in the study of the relationship between language and society. In addition, the broad scope of their treatment of these concerns has created a work in which many, if not most, of the assumptions guiding the contemporary study of language use are to found."   Douglas G. Glick, Semiotica (1996)