Kollman, K. (2012). The American political system. W.W. Norton & Co..
Chicago Edition CitationKollman, Ken. The American Political System. New York: W.W. Norton & Co., 2012.
Cita MLAKollman, Ken. The American Political System. W.W. Norton & Co., 2012.
Atenció: Aquestes cites poden no estar 100% correctes.