@incollection{Steiner88-activity,
  author	= {Steiner, Erich},
  editor	= {Fawcett, Robin P. and Young, David},
  year		= {1988},
  title		= {Describing language as activity - an application to child language},
  booktitle	= {New developments in systemic linguistics: theory and application},
  publisher	= {Pinter},
  address	= {London},
  pages		= {144--174}
}