APA (7th ed.) Citation

Guffey, M. E. (2009). Essentials of business communication (8th ed.). Cengage Learning, Inc.

Chicago Style (17th ed.) Citation

Guffey, Mary Ellen. Essentials of Business Communication. 8th ed. United States: Cengage Learning, Inc, 2009.

MLA (8th ed.) Citation

Guffey, Mary Ellen. Essentials of Business Communication. 8th ed. Cengage Learning, Inc, 2009.