Pugel Thomas A. (2009). International Economics (13th.). Tata McGraw-Hill.
芝加哥风格引文Pugel Thomas A. International Economics. 13th. New Delhi: Tata McGraw-Hill, 2009.
MLA引文Pugel Thomas A. International Economics. 13th. Tata McGraw-Hill, 2009.
警告：这些引文格式不一定是100％准确.