APA aipamena

Krugman, P. R. (2014). International Economics (8th.). Pearson.

Chicago Style aipamena

Krugman, Paul R. International Economics. 8th. Noida: Pearson, 2014.

MLA aipamena

Krugman, Paul R. International Economics. 8th. Pearson, 2014.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.