APA ציטוט

Guffey, M. E. (2010). Essentials of business communication 2nd ed. Cengage Learning.

Chicago Style (17th ed.) Citation

Guffey, Mary Ellen. Essentials of Business Communication 2nd Ed. Cengage Learning, 2010.

ציטוט MLA

Guffey, Mary Ellen. Essentials of Business Communication 2nd Ed. Cengage Learning, 2010.