Gilpin, Alan, author
Cambridge University Press, 1996
Buku Teks
edited by George Gerbner, Richard B. Byrne
John Wiley & Sons, 1981
Buku Teks
Russel, Fox Hon, author
Covendish Publishing Limited, 2000
Buku Teks
by Phillip J. Cooper [and others]
Harcourt, Brace, 1998
Buku Teks
Baker, Stanley B., author
Prentince-Hall, 1996
Buku Teks