Pugel, T. A. (2016). International economics (16th ed.). McGraw-Hill.
芝加哥风格引文Pugel, Thomas A. International Economics. 16th ed. New York, NY: McGraw-Hill, 2016.
MLA引文Pugel, Thomas A. International Economics. 16th ed. McGraw-Hill, 2016.
警告：这些引文格式不一定是100％准确.