APA (7th ed.) Citation

Guffey, M. E., & Loewy, D. (2013). Essentials of business communication (9th ed.). South-Western.

Chicago Style (17th ed.) Citation

Guffey, Mary Ellen, and Dana Loewy. Essentials of Business Communication. 9th ed. Australia [etc.]: South-Western, 2013.

MLA (9th ed.) Citation

Guffey, Mary Ellen, and Dana Loewy. Essentials of Business Communication. 9th ed. South-Western, 2013.