Effron, J. E., & Santos, E. T. (1999). International marketing. I/AME Design Studio.
Lua i Stíl Chicago (17ú heag.)Effron, Jack Edward, agus Emmanuel Tiu Santos. International Marketing. Makati: I/AME Design Studio, 1999.
Lua MLA (9ú heag.)Effron, Jack Edward, agus Emmanuel Tiu Santos. International Marketing. I/AME Design Studio, 1999.
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