Cita APA (7th ed.)
Yarbrough, B. V. The World Economy: International Trade (7a edición.). Thomson : South-Western.
Cita Chicago (17th ed.)
Yarbrough, Beth V. The World Economy: International Trade. 7a edición. Mason, EUA: Thomson : South-Western.
Cita MLA (9th ed.)
Yarbrough, Beth V. The World Economy: International Trade. 7a edición. Thomson : South-Western.
Atenció: Aquestes cites poden no estar 100% correctes.