Duverger, Maurice, author
RajaGrafindo Persada, 2010
Buku Teks
Princeton University Press, 1980
Buku Teks
Hacker, Andrew
McGraw-Hill, 1973
Buku Teks
Laski, Harold J., author
MCML Yayasan Pembangunan, 1950
Buku Teks
Marcos, E.Ferdinand
The Marcos Foundation, 1978
Buku Teks