Neal, Harry Edward
Diary of democracy the story of political parties in America
Julian Messner, 1963
 Buku Teks SO
Neal, Harry Edward
Diary of democracy; the story of political parties in America
Julian Messner, 1967
 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