@book{BrownLevinson87,
  author	= {Brown, Penelope and Levinson, Stephen C.},
  year		= {1987},
  title		= {Politeness: some universals in language usage},
  note		= {Revised version of `Universals in language usage: politeness phenomena', originally published in E. Goody (ed.)(1978) \em Questions and Politeness: Strategies in Social Interaction, Cambridge University Press},
  publisher	= {Cambridge University Press},
  address	= {Cambridge}
}