Dyfyniad APA

Krugman, P. R., & Obstfeld, M. (2003). International economics: Theory and policy (6th ed.). Pearson Education Inc..

Dyfyniad Arddull Chicago

Krugman, Paul R., and Maurice Obstfeld. International Economics: Theory and Policy. 6th ed. Boston ; New Delhi: Pearson Education Inc., 2003.

Dyfyniad MLA

Krugman, Paul R., and Maurice Obstfeld. International Economics: Theory and Policy. 6th ed. Pearson Education Inc., 2003.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.