Edited by Alison Mackey, Dudan M. Gass
Wiley-Blackwell, 2012
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Norwich : Edward Arnold, The educationl, academic and medical publishing
Majalah, Jurnal, Buletin
edited by Theodore Eliades
Springer, 2013
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Tsui, Amy B. M.
Cambridge University Press, 2003
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Wallace, Michael J.
Cambridge University Press, 2004
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