Artikel Jurnal
New York : American Political Science Association
Majalah, Jurnal, Buletin
edited by Miles Kahler
Cornell University Press, 2009
Buku Teks
Marielba Zacarias, Jose Valente de Oliveira, editors
[Springer, ], 2012
eBooks
New York, N.Y. Holt c.1955,
Buku Teks