Dyfyniad APA

Krugman, P. R., & Obstfeld, M. (2009). International Economics: Theory& Policy. Pearson.

Dyfyniad Arddull Chicago

Krugman, Paul R., and Maurice Obstfeld. International Economics: Theory& Policy. South Asia: Pearson, 2009.

Dyfyniad MLA

Krugman, Paul R., and Maurice Obstfeld. International Economics: Theory& Policy. Pearson, 2009.

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