@book{HallidayHasan85,
  author	= {Halliday, Michael A. K. and Hasan, Ruqaiya},
  year		= {1985},
  title		= {Language, Context and Text: a social semiotic perspective},
  note		= {(Language and Learning Series). Also: Oxford University Press, London, 1989},
  publisher	= {Deakin University Press},
  address	= {Geelong, Victoria}
}