stratified

Sources

• BROWN & LEVINSON 246 (stratified society)

  BROWN, Penelope & LEVINSON, Stephen C. (1987) Politeness: Some universals in language usage. Cambridge : Cambridge University Press.

• RICHARDS etal. 1992 321 (stratified sample)

  RICHARDS, Jack, PLATT, J. & WEBER, H. (1992) Longman Dictionary of Language Teaching & Applied Linguistics. London: Longman.