Lua APA (7ú heag.)

Root, F. R. (1990). International trade and investment (6th ed.). South-Western Pub. Co.

Lua i Stíl Chicago (17ú heag.)

Root, Franklin R. International Trade and Investment. 6th ed. Cincinnati, OH: South-Western Pub. Co, 1990.

Lua MLA (9ú heag.)

Root, Franklin R. International Trade and Investment. 6th ed. South-Western Pub. Co, 1990.

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