Whalley, J. (1996). Why do countries seek regional trade agreementsn. National Bureau of Economic Research.
芝加哥风格引文Whalley, John. Why Do Countries Seek Regional Trade Agreementsn. Cambridge: National Bureau of Economic Research, 1996.
MLA引文Whalley, John. Why Do Countries Seek Regional Trade Agreementsn. National Bureau of Economic Research, 1996.
警告：这些引文格式不一定是100％准确.