Barker, Chris, author
Sage , 2001
Buku Teks
Schiffrin, Deborah, author
Cambridge University Press, 1996
Buku Teks
Fairclough, Norman, author
Hodder Education, 1995
Buku Teks
Machin, David, author
Sage, 2010
Buku Teks
Cambridge University Press, 1982
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