8Brown, H.D. Teaching By Principles: An Interactive Approaches to Language Pedagogy [M]. New Jersey: Prentice Hall Regents, 1994.
9Halliday, M.A.K. Language as Social Semiotic: The Social Interpretation of Language and Meaning [M]. London: Edward Arnold, 1978.
10Halliday, M.A.K.&Hasan, R. Language, Context and Text: Aspects of Language in a Socialsemiotic Perspective [M]. Geelong, Vic.: Deakin University Press, 1985.
