@incollection{Halliday92-how,
  author	= {Halliday, M. A. K.},
  editor	= {Davies, Martin and Ravelli, Louise},
  year		= {1992},
  title		= {How do you mean?},
  booktitle	= {Advances in systemic linguistics: recent theory and practice},
  publisher	= {Pinter},
  address	= {London},
  pages		= {20--37}
}