Eicher, T. S., & Henn, C. (2009). In search of WTO trade effects: Preferential trade agreements promote trade strongly, but unevenly. International Monetary Fund.
芝加哥风格引文Eicher, Theo S., 与 Christian Henn. In Search of WTO Trade Effects: Preferential Trade Agreements Promote Trade Strongly, but Unevenly. [Washington D.C.]: International Monetary Fund, 2009.
MLA引文Eicher, Theo S., 与 Christian Henn. In Search of WTO Trade Effects: Preferential Trade Agreements Promote Trade Strongly, but Unevenly. International Monetary Fund, 2009.
警告：这些引文格式不一定是100％准确.