Phillips, D.C., author
Stanford University Press, 1976
Buku Teks
Habermas, Jurgen, author
Polity Press, 1968
Buku Teks
Reynolds, Paul Davidson, author
Prentice-Hall, 1982
Buku Teks
Blalock, Hubert M., author
Sage Publications, 1982
Buku Teks
Mackenzie,
Penguin Books, 1969
Buku Teks