Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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