Public opinion and polling around the world : a historical encyclopedia /

por Adams, Valerie, Adams, Valerie, Adrogué, Gerardo, Al-Braizat, Fares, Albritton, Robert B., Arceneaux, Kevin, Arian, Asher, Azadarmaki, Taghi, Barabas, Jason, Bartels, Larry M., Beniger, James R., Bjorklund, Tor, Bloom, Joel David, Blunt, Christopher C., Boyd, Richard W., Brinegar, Adam
Publicado 2004

Obama and America's political future /

por Skocpol, Theda
Publicado 2012

Political science : the state of the discipline II /

por Brady, Henry E. 1947-
Publicado 1993