APA استشهاد

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

استشهاد بنمط شيكاغو

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

MLA استشهاد

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