Wai Wen chu ban she, 2007
Buku Teks
Buku Teks
by Franz Michael, Carl Linden, Jan Pryblyla, Jurgen Domes
Westview Press, 1990
Buku Referensi
edited by Denis Dwyer
Longman Scientific & Technical, 1994
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Mackerras, Colin
Longman Cheshire, 1994
Buku Teks