Cady, John F.
Prentice-Hall, 1966
Buku Teks
Orwell, George, 1903-1950, author
Penguin Books, 1989
Buku Teks
Kramer, Tom
ISEAS, 2007
Buku Teks
Cady, John F., author
Cornell University Press, 1960
Buku Teks
Pile, John F.
John Wiley & Sons, 1979
Buku Teks