@incollection{BatesMacWhinney79,
  author	= {Bates, E. and MacWhinney, B.},
  editor	= {Ochs, E. and Schieffelin, B.},
  title		= {A functionalist approach to the acquisition of grammar},
  year		= {1979},
  title		= {Propositions across Utterances and Speakers},
  booktitle	= {Developmental Pragmatics},
  publisher	= {Academic Press},
  address	= {New York},
  pages		= {167--211}
}