edited by James C. Charlesworth
The Free Press, 1968
Buku Teks
Dyke, Vernon van, author
Stanford University Press, 1962
Buku Teks
Apter, David E., author
Winthrop, 1977
Buku Teks
Lasswell, Harold D.
Routledge & Kegan Paul Ltd., 1949
Buku Teks
edited by David Ingram
Blackwell , 2002
Buku Teks