Daniels, J. D. (2007). International business environments and operations John D. Daniels, Lee H. Radebaugh and Daniel P. Sullivan. Pearson.
Lua i Stíl Chicago (17ú heag.)Daniels, John D. International Business Environments and Operations John D. Daniels, Lee H. Radebaugh and Daniel P. Sullivan. Pearson, 2007.
Lua MLA (8ú heag.)Daniels, John D. International Business Environments and Operations John D. Daniels, Lee H. Radebaugh and Daniel P. Sullivan. Pearson, 2007.
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