Cita APA

Guffey, M. E. (2004). Essentials of business communication (6th ed.). Australia, [etc.]: South-Western College Publishing.

Citación estilo Chicago

Guffey, Mary Ellen. Essentials of Business Communication. 6th ed. Australia, [etc.]: South-Western College Publishing, 2004.

Cita MLA

Guffey, Mary Ellen. Essentials of Business Communication. 6th ed. Australia, [etc.]: South-Western College Publishing, 2004.