Davies, Florence
Penguin English , 1994
Buku Teks
Yu, Hui, author
China Intercontinental Press, 2007
Buku Teks
Fiske, John, author
Routledge, 1994
Buku Teks
by Martha Dallmann ... [et al.]
Holt, Rinehart and Winston, 1982
Buku Teks
Elkin, Judith, author
Facet Publishing , 2004
Buku Teks