APA-viite

Krugman, P. R., & Obstfeld, M. (1996). International economics: Theory and policy (4th ed.). Addison Wesley.

Chicago-tyylinen lähdeviittaus

Krugman, Paul R., ja Maurice Obstfeld. International Economics: Theory and Policy. 4th ed. Massachusetts: Addison Wesley, 1996.

MLA-viite

Krugman, Paul R., ja Maurice Obstfeld. International Economics: Theory and Policy. 4th ed. Addison Wesley, 1996.