Krugman, P. R., & Obstfeld, M. (1994). International economics: Theory and policy (3rd.ed.). Harper Collins.
芝加哥风格引文Krugman, Paul R., 与 Maurice Obstfeld. International Economics: Theory and Policy. 3rd.ed. Harper: Harper Collins, 1994.
MLA引文Krugman, Paul R., 与 Maurice Obstfeld. International Economics: Theory and Policy. 3rd.ed. Harper Collins, 1994.
警告：这些引文格式不一定是100％准确.