Nelson, Harold L.
Foundation Press, 1969
Buku Teks SO
McQuail, Denis
Collier-Macmillan, 1969
Buku Teks
edited by Wilbur Schramm
University of Illnois Press, 1954
Buku Teks SO
Emery, Edwin
Dodd, Mead Company, 1968
Buku Teks SO
Edited by Ralph O. Nafziger; David M. White
Louisiana State University Press, 1963
Buku Teks SO