Tydeman, William
Macmillan Education, 1988
Buku Teks
Matthiessen, F.O., author
Oxford University Press, 1959
Buku Teks
Cooper, John Xiros, author
Cambridge University Press, 2006
eBooks
Bradbrook, M.C. (Muriel Clara), 1909-1993, author
Longmans Green, 1950
Buku Teks
The Athlone Press, 1993
Buku Teks