Shanghai World Book [t.th.]
Buku Referensi
Beijing Wai Yan She (Foreign Language Teaching and Research Press) 2002
Buku Referensi
Beijing-Oxford The Commercial Press 1998
Buku Referensi
Beijing Beijing Yuyan Wenhua Daxuie Chubanshe 2000
Buku Referensi
London, 1982
Buku Referensi