Cita APA (7a ed.)

Guffey, M. E. (2005). Business communication: Process and product (5th ed.). South-Western College Publishing.

Cita Chicago Style (17a ed.)

Guffey, Mary Ellen. Business Communication: Process and Product. 5th ed. Australia, [etc.]: South-Western College Publishing, 2005.

Cita MLA (9a ed.)

Guffey, Mary Ellen. Business Communication: Process and Product. 5th ed. South-Western College Publishing, 2005.