Banfield, Edward C., author
Free Press, 1966
Buku Teks
International Publ., 1970
Buku Teks
The Democratic Action Party, 1969
Buku Teks
Pareto, Vilfredo, author
Frederick A. Praeger, 1966
Buku Teks
edited by William R. Spriegel and Clark E. Myers
R.D. Irwin, 1953
Buku Teks