Watts, Simon, author
Sage, 2013
Buku Teks
Silverman, David, author
Sage Publications , 2010
Buku Teks
Gaultney, Jane F., author
California, 2007
Buku Teks
Silverman, David, author
Sage , 2013
Buku Teks
Magnusson, Eva, author
Cambridge University Press, 2015
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