@book{Torr97,
  author	= {Torr, J.},
  title		= {From child tongue to mother tongue: A case study of language development during the first two and a half years},
  publisher	= {University of Nottingham},
  year		= {1997},
  number	= {9},
  series	= {Monographs in Systemic Linguistics},
  address	= {Nottingham}
}