Παραπομπή APA

Krugman,Paul R, & Obstfeld,Maurice. (1997). International economics: Theory and policy. Addison - Wesley.

Παραπομπή Chicago Style

Krugman,Paul R, και Obstfeld,Maurice. International Economics: Theory and Policy. New York: Addison - Wesley, 1997.

Παραπομπή MLA

Krugman,Paul R, και Obstfeld,Maurice. International Economics: Theory and Policy. Addison - Wesley, 1997.