@incollection{Halliday68-uses,
  author	= {Halliday, M. A. K.},
  editor	= {Fishman, Joshua F.},
  year		= {1968},
  title		= {The users and uses of language},
  booktitle	= {Readings in the sociology of language},
  pages		= {139--169},
  publisher	= {Mouton},
  address	= {The Hague}
}