Cita APA (7th ed.)

Guffey, M. E., & Loewy, D. (2010). Essentials of business communication (8th ed.). South-Western Cengage Learning.

Cita Chicago (17th ed.)

Guffey, Mary Ellen, i Dana Loewy. Essentials of Business Communication. 8th ed. Mason, OH: South-Western Cengage Learning, 2010.

Cita MLA (9th ed.)

Guffey, Mary Ellen, i Dana Loewy. Essentials of Business Communication. 8th ed. South-Western Cengage Learning, 2010.