Neal, Harry Edward
Diary of democracy; the story of political parties in America
Julian Messner, 1967
 Buku Teks SO
Political parties and democracy in central America
edited by Louis W. Goodman, William M. LeoGrande, Johanna Mendelson Forman
Westview Press, 1992
 Buku Teks SO
Parties and democracy
Konkrad-Adenauer-Stiftung, editor
Konkrad-Adenauer-Stiftung, 2007
 Buku Teks SO
Michels, Robert, 1876-1936
Political Parties : a sociological study of the oligarchical tendencies of modern democracy
Collier Books, 1962
 Buku Teks SO
Inthe name of democracy: commoditization of religions by political parties in Indonesia
 Artikel Jurnal