Krugman, P. (2009). The conscience of a liberal: Reclaiming America from the right. Penguin Books.
芝加哥风格引文Krugman, Paul. The Conscience of a Liberal: Reclaiming America from the Right. London: Penguin Books, 2009.
MLA引文Krugman, Paul. The Conscience of a Liberal: Reclaiming America from the Right. Penguin Books, 2009.
警告：这些引文格式不一定是100％准确.