Guffey, M. E. (2006). Business communication: Process & product (5th ed.). Thomson/South-Western.
Citação norma ChicagoGuffey, Mary Ellen. Business Communication: Process & Product. 5th ed. Mason, OH: Thomson/South-Western, 2006.
Citação norma MLAGuffey, Mary Ellen. Business Communication: Process & Product. 5th ed. Thomson/South-Western, 2006.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.