Krugman, P. R. (1999). The return of depression economics (First edition.). W.W. Norton.
芝加哥风格引文Krugman, Paul R. The Return of Depression Economics. First edition. New York: W.W. Norton, 1999.
MLA引文Krugman, Paul R. The Return of Depression Economics. First edition. W.W. Norton, 1999.
警告：这些引文格式不一定是100％准确.