Daniels, J. D., Radebaugh, L. H., & Sullivan, D. P. (2011). International business: Environments and operations/13e (13th ed.). Printice Hall.

Daniels, John D., Lee H. Radebaugh, and Daniel P. Sullivan. International Business: Environments and Operations/13e. 13th ed. Boston: Printice Hall, 2011.

Daniels, John D., et al. International Business: Environments and Operations/13e. 13th ed. Printice Hall, 2011.