APA-viite (7. p.)

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

Chicago-viite (17. p.)

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

MLA-viite (9. p.)

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