Geer, J. G. (2006). In defense of negativity: Attack ads in presidential campaigns. University of Chicago Press.
芝加哥风格引文Geer, John Gray. In Defense of Negativity: Attack Ads in Presidential Campaigns. Chicago: University of Chicago Press, 2006.
MLA引文Geer, John Gray. In Defense of Negativity: Attack Ads in Presidential Campaigns. University of Chicago Press, 2006.
警告：这些引文格式不一定是100％准确.