@incollection{HallidayJames93,
  author	= {Halliday, M. A. K and James, Zoe L.},
  editor	= {Hoey, Michael and Sinclair, John M. and Fox, Gwyneth},
  year		= {1993},
  title		= {A quantitative study of polarity and primary tense in the English finite clause},
  booktitle	= {Techniques of Description: Spoken and Written Discourse (A Festschrift for Malcolm Coulthard)},
  publisher	= {Routledge},
  address	= {London and New York}
}