Ur, Penny
Cambridge University Press, 1999
Buku Referensi
Potapova, Nina F.
Foreign Languages Publishing House, 1959
Buku Teks
T. S. Lie
Angus and Robertson, 1996
Buku Teks
translated into modern Chinese by Chen Junying and Jianyuan
Hunan People Publishing House, 2008
Buku Teks
Roach, Peter (Peter John)
Cambridge University Press, 1983
Buku Teks