Holloway, John
Cambridge University Press, 1979
Buku Teks SO
Longman, 1996
Buku Teks SO
Kermode, Frank, editor
Harvard University Press, 1980
Buku Teks SO
Schiffrin, Deborah
Cambridge University Press , 2006
Buku Teks SO
De Fina, Anna
Cambridge University Press;, 2012
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