Krugman, P. R. (1994). Geography and trade. Leuven University Press ; MIT Press.
Chicago Style (17th ed.) CitationKrugman, Paul R. Geography and Trade. Leuven, Belgium : Cambridge, Mass.: Leuven University Press ; MIT Press, 1994.
MLA引文Krugman, Paul R. Geography and Trade. Leuven University Press ; MIT Press, 1994.
警告:這些引文格式不一定是100%准確.