Mullerson, Rein
Routledge, 1999
Buku Teks
Ruth Wodak, Majid Khosravinik, Brigite Mral
Bloomsbury Publishing, 2013
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Gsovski, Vladimir
Atlantic Books, 1959
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Bunn, Isabella D., author
Hart Publishing, 2012
Buku Teks
Tobin, John, author
Oxford University Press, 2012
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