@incollection{Halliday94-codes,
  author	= {Halliday, M. A. K.},
  editor	= {Sadovnik, Alan},
  year		= {1994},
  title		= {Language and the theory of codes},
  booktitle	= {Knowledge and pedagogy: the sociology of Basil Bernstein},
  publisher	= {Ablex},
  address	= {Norwood, N.J.},
  pages		= {124--142}
}