APA (7th ed.) Citation

Krugman, P. R. (2012). International economics: Theory and policy (9th. ed., global ed.). Pearson Education Limited.

Chicago Style (17th ed.) Citation

Krugman, Paul R. International Economics: Theory and Policy. 9th. ed., global ed. Harlow: Pearson Education Limited, 2012.

MLA (9th ed.) Citation

Krugman, Paul R. International Economics: Theory and Policy. 9th. ed., global ed. Pearson Education Limited, 2012.