edited by Robert F. Ash, Y.Y. Kueh
Clarendon press , 1996
Buku Teks
Chow, Gregory C.
Blackwell, 2002
Buku Teks
Wong, John
Singapore university press, 2002
Buku Teks
Yang, Dali L.
Routledge, 1997
Buku Teks
Mackerras, Colin
Longman Cheshire, 1994
Buku Teks SO