Garnham, David
Ballinger Publishing Company, 1988
Buku Teks
Joshua, Wynfred, author
Sage, 1973
Buku Teks
Kitzinger, Uwe W., author
Frederick A. Praeger, 1963
Buku Teks
Granick, David
MIT Press, 1972
Buku Teks
Meny, Yves
Oxford University Press, 1998
Buku Teks