APA引文

Krugman, P. R., Obstfeld, M., & Melitz, M. J. (2015). International economics: Theory & policy. Pearson Addison-Wesley.

Trích dẫn kiểu Chicago

Krugman, Paul R., Maurice Obstfeld, và Marc J. Melitz. International Economics: Theory & Policy. Pearson Addison-Wesley, 2015.

MLA引文

Krugman, Paul R., Maurice Obstfeld, và Marc J. Melitz. International Economics: Theory & Policy. Pearson Addison-Wesley, 2015.

警告：这些引文格式不一定是100％准确.