@incollection{KeenanSchieffelin76,
  author	= {Keenan, E. O. and Schieffelin, B. B.},
  editor	= {Li, Charles},
  title		= {Topic as a discourse notion},
  booktitle	= {Subject and Topic},
  publisher	= {Academic Press},
  year		= {1976},
  address	= {New York}
}