@incollection{Lock92,
  author	= {Lock, Graham},
  editor	= {Tench, Paul},
  year		= {1992},
  title		= {Non-segmental phonology and variable rules: investigating variation in Singapore Mandarin nasal finals},
  booktitle	= {Studies in systemic phonology},
  publisher	= {Pinter},
  address	= {London}
}