Krugman, P. R. (1988). International economics: Theory and policy. Scott, Foresman and Company.
芝加哥风格引文Krugman, Paul R. International Economics: Theory and Policy. Boston: Scott, Foresman and Company, 1988.
MLA引文Krugman, Paul R. International Economics: Theory and Policy. Scott, Foresman and Company, 1988.
警告：这些引文格式不一定是100％准确.