Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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