APA引文

Krugman, P. R. (1996). International economics: Theory and policy. Reading, Massachusetts: Addition-Wesley.

Trích dẫn kiểu Chicago

Krugman, Paul R. International Economics: Theory and Policy. Reading, Massachusetts: Addition-Wesley, 1996.

MLA引文

Krugman, Paul R. International Economics: Theory and Policy. Reading, Massachusetts: Addition-Wesley, 1996.

警告：这些引文格式不一定是100％准确.