@incollection{Nelson87,
  author	= {Nelson, Katherine and Levy, Elena},
  editor	= {Steele, Ross and Threadgold, Terry},
  year		= {1987},
  title		= {Development of referential cohesion in a child's monologues},
  booktitle	= {Language topics: essays in honour of Michael Halliday},
  publisher	= {Benjamins},
  address	= {Amsterdam}
}