APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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