@incollection{Gregory87,
  author	= {Gregory, Michael J.},
  editor	= {Halliday, M. A. K. and Fawcett, Robin P.},
  year		= {1987},
  title		= {Meta-functions: aspects of their development, status and use in systemic linguistics},
  booktitle	= {New development in systemic linguistics: theory and description},
  volume	= {1},
  publisher	= {Frances Pinter},
  address	= {London}
}