Guoguang Wu, Helen Lansdowne, editor
Routledge, 2008
Buku Teks
Mackerras, Colin, author
Longman Cheshire, 1994
Buku Teks
Whiting, Allen S.
McGraw-Hill , 1980
Buku Teks
Lowe, J.
Printed at the Connercial, 1912
Buku Teks
Foreign Language Press, 1985
Buku Teks