Mason, Jennifer
Sage, 2009
Buku Teks
Hatim, Basil
Pearson Education , 2001
Buku Teks
McKay, Sandra Lee
Mahwah, New Jersey, 2006
Buku Teks
Ngeow Chow-Bing, editor
Routledge, Taylor & Francis Group, 2019
Buku Teks
Miguel A R B Castanho, editor
[, Springer], 2012
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