Political parties and democracy in central America
edited by Louis W. Goodman, William M. LeoGrande, Johanna Mendelson Forman
Westview Press, 1992
 Buku Teks SO
Siregar, Fritz Edward
The political context of judicial review in indonesia
Faculty of Law University of Indonesia, 2015
 Artikel Jurnal
Braybrooke, David
Three tests for democracy : personal right, human welfare, collective preference
Random House , 1968
 Buku Teks
Cummings, Milton C.
Democracy under pressure: an introduction to the American political system
Harcourt Brace Jovanovich, 1977
 Buku Teks SO
Neal, Harry Edward
Diary of democracy the story of political parties in America
Julian Messner, 1963
 Buku Teks SO