Cook, Michael, author
Gower , 1999
Buku Teks
Edited by Graham Matthews; John Feather
Ashgate, 2003
Buku Teks
Lidman, Tomas, 1948 - , author
Chandos Pub., 2012
Buku Teks
Gopal, Sarvepalli, author
Oxford University Press, 1979
Buku Teks
Preston, Andrew, author
Oxford University Press, 2017
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