Cytowanie według stylu APA (wyd. 7)

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

Cytowanie według stylu Chicago (wyd. 17)

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

Cytowanie według stylu MLA (wyd. 9)

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