@incollection{Halliday79-80,
  author	= {Halliday, M. A. K.},
  editor	= {Haussler, Myna M. and Strickland, Dorothy S. and Goodman, Yetta M.},
  year		= {1979/1980},
  title		= {Three aspects of children's language development: learning language, learning through language, learning about language},
  booktitle	= {Oral and Written Language Development: impact on schools},
  pages		= {7--19}
}