APA Style

Obstfeld, Maurice, Krugman, Paul R.. (2009). International Economics: Theory & Policy, 8th Edition (8th). Boston: Pearson Education, Inc.

Chicago Style

Obstfeld, Maurice, Krugman, Paul R.. International Economics: Theory & Policy, 8th Edition. 8th Boston: Pearson Education, Inc, 2009. Text.

MLA Style

Obstfeld, Maurice, Krugman, Paul R.. International Economics: Theory & Policy, 8th Edition. 8th Boston: Pearson Education, Inc, 2009. Text.

Turabian Style

Obstfeld, Maurice, Krugman, Paul R.. International Economics: Theory & Policy, 8th Edition. 8th Boston: Pearson Education, Inc, 2009. Print.