@incollection{Gregory88,
  author	= {Gregory, Michael J.},
  editor	= {Cummings, Michael J. and Greaves, William S. and Benson, James D.},
  year		= {1988},
  title		= {Generic situation and register: a functional view of communication},
  booktitle	= {Linguistics in a systemic perspective},
  publisher	= {Benjamins},
  address	= {Amsterdam}
}