Hartmann, Reinhard R.K., author
Routledge, 1998
Buku Referensi
Hartmann, Reinhard R.K., author
Routledge , 1998
Buku Referensi
Landau, Sidney I., author
Cambridge University Press, 2001
Buku Referensi
Hartmann, Reinhard R.K., author
Pearson Education, 2001
Buku Teks
Ooi, Vincent B.Y.
Edinburgh University Press, 1998
Buku Teks