@incollection{Fraser,
  author	= {Fraser, Bruce},
  editor	= {Cole, P. and Morgan, J. L.},
  year		= {1975},
  title		= {Hedged performatives},
  booktitle	= {Speech Acts},
  series	= {Syntax and Semantics},
  volume	= {3},
  pages		= {187--210},
  publisher	= {Academic Press}
}