Pugel, T. A. (2007). International Economics (13th.). McGraw Hill Education (India) Private Limited.
芝加哥风格引文Pugel, Thomas A. International Economics. 13th. New Delhi: McGraw Hill Education (India) Private Limited, 2007.
MLA引文Pugel, Thomas A. International Economics. 13th. McGraw Hill Education (India) Private Limited, 2007.
警告：这些引文格式不一定是100％准确.