Brandi, Ulrike, author
Birkhäuser, 2001.
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Wendy Gunn, editor, Ton Otto, editor, Rachel Charlotte Smith, editor
Bloomsbury, 2013
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Laurene Vaughan
Bloomsbury Academic, 2017
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Tomlinson, M. J. (Michael John), author
E & Fn Spon, 1997
Buku Referensi
Routledge, 2013
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