CAVES, R. E. (2007). World Trade and Payments an introduction ed.10. Addison Wesley.
Lua i Stíl Chicago (17ú heag.)CAVES, Richard E. World Trade and Payments an Introduction Ed.10. Addison Wesley, 2007.
Lua MLA (8ú heag.)CAVES, Richard E. World Trade and Payments an Introduction Ed.10. Addison Wesley, 2007.
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