Miles, David, author
John Wiley & Sons, 2012
Buku Teks
KNight, Bruce Winton
Alfred A. Knoff , 1952
Buku Teks
Voice of America Forum Lectures , 1968
Buku Teks
Schroeder, Richard C., author
International Communicational Agency, [date of publication not identified]
Buku Teks
Schneider, Herbert W., author
Columbia University Press, 1947
Buku Teks