APA引文

Krugman , P. R. (2017). International Economics: Theory and Policy (8th.). Pearson Education.

Chicago Style (17th ed.) Citation

Krugman , Paul R. International Economics: Theory and Policy. 8th. Chennai: Pearson Education, 2017.

MLA引文

Krugman , Paul R. International Economics: Theory and Policy. 8th. Pearson Education, 2017.

警告：這些引文格式不一定是100％准確.