APA-viite

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

Chicago-tyylinen lähdeviittaus

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

MLA-viite

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