Lua APA (7ú heag.)

Krugman, P. R., & Obstfeld, M. (1991). International economics: Theory and policy (2nd ed.). Harper Collins.

Lua i Stíl Chicago (17ú heag.)

Krugman, Paul R., agus Maurice Obstfeld. International Economics: Theory and Policy. 2nd ed. New York: Harper Collins, 1991.

Lua MLA (9ú heag.)

Krugman, Paul R., agus Maurice Obstfeld. International Economics: Theory and Policy. 2nd ed. Harper Collins, 1991.

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