Dyfyniad APA

Krugman, P. R. (2004). International economics: Theory and policy (6th ed.). Pearson Education.

Dyfyniad Arddull Chicago

Krugman, Paul R. International Economics: Theory and Policy. 6th ed. Delhi: Pearson Education, 2004.

Dyfyniad MLA

Krugman, Paul R. International Economics: Theory and Policy. 6th ed. Pearson Education, 2004.

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