APA引文

Krugman, P. R., & Obstfeld, M. (1996). International economics: Theory and policy (4th ed.). Addison Wesley.

Chicago Edition Citation

Krugman, Paul R., and Maurice Obstfeld. International Economics: Theory and Policy. 4th ed. Massachusetts: Addison Wesley, 1996.

MLA引文

Krugman, Paul R., and Maurice Obstfeld. International Economics: Theory and Policy. 4th ed. Addison Wesley, 1996.

警告：這些引文格式不一定是100％准確.