Universitas Indonesia, 2006
UI - Tesis (Membership)
Artikel Jurnal
Edwards, Douglas, author
Polity Press, 2014
Buku Teks
Eggen, Jean Macchiaroli, author
Thomson/West, 2010
Buku Teks
edited by David R. Patrick
Van Nostrand Reinhold, 1994
Buku Referensi