Artikel Jurnal
Forrest-Thomson, Veronica, author
Manchester University Press, 1978
Buku Teks
edited by Gordon S. Haight
Methuen, 1966
Buku Teks
Olsen, Alexandra Hennessey
Peter Lang, 1984
Buku Teks
Hao, Yu Xian, author
Liaoning Renmin Chubanshe, 2000
Buku Teks