Clark, Giles, author
Routledge , 1996
Buku Teks
Book House Training Centre/Unesco
Book House Training Centre, 1991
Buku Referensi
Williamson, Hugh
Yale University Press, 1983
Buku Teks
Clark, Giles, author
Routledge, 1996
Buku Referensi
Yang, Hu, 1980-, author
Wu zhou chuan bo chu ban she, 2010
Buku Teks