APA Style

Guffey, M, E., Loewy, D. (2013). Essentials of Business Communication. Ninth Edition (Ninth Edition). Mason, OH: South-Western Cengage Learning.

MLA Style

Guffey, Mary, Ellen., Loewy, Dana. "Essentials of Business Communication. Ninth Edition". Ninth Edition Mason, OH: South-Western Cengage Learning, 2013. Text.