Uhlmann, Anthony
Cambridge University Press , 1999
Buku Teks
Michiels, Ivo, author
De Bezige Bij, 1973
Buku Teks
McCutchen, Samuel P.
Macmillan, 1962
Buku Teks
Chen Chiung-ling, 2000
Buku Referensi
Alcock, Rutherford, Sir, author
Longman, 1863
Buku Teks