Greene, Graham, author
Everyman's Library, 1992
Buku Teks
Parker, Lee D., author
Prentice-Hall, 1989
Buku Teks
Lewis, Gerald
Auerbach Publications, 2006
Buku Teks
Huchingson, R. Dale, author
McGraw-Hill, 1981
Buku Teks
Habbel, Rolf W., author
Palgrave Macmillan, 2002
Buku Teks