@incollection{Halliday91,
  author	= {Halliday, M. A. K},
  editor	= {Christie, Frances},
  year		= {1991},
  title		= {Linguistic perspectives on literacy: a systemic-functional approach},
  booktitle	= {Literacy in social processes: papers from the Inaugral Australian Systemic Linguistics Conference, Deakin University, January 1990},
  publisher	= {Centre for Studies of Language in Education, Northern Territory University},
  address	= {Darwin}
}