Weber, Max, 1864-1920, author
New York,N.Y. Free Press 1964,
Buku Teks
Edward Shils
University of Chicago Press, 1976
Buku Teks
Gurley, John G.
The Brookings Institution , 1960
Buku Teks
Information Agency, 1973
Buku Teks
Vinacke, Harold M., author
Indiana University Press, 1957
Buku Teks