edited by Joseph C. Schumacher
Reinhold, 1960
Buku Teks
Morris, J.N.
Livingstone, 1975
Buku Teks
edited by Jay G. Blumler and Elihu Katz
Sage, 1974
Buku Teks
Landau, David, author
Houghton Miffiln, 1972
Buku Teks
Thompson, Denys
Cambridge University Press, 1980
Buku Teks