Guffey, M. E. (2010). Essentials of business communication 2nd ed. Cengage Learning.
Chicago Style (17th ed.) CitationGuffey, Mary Ellen. Essentials of Business Communication 2nd Ed. Cengage Learning, 2010.
MLA citiranjeGuffey, Mary Ellen. Essentials of Business Communication 2nd Ed. Cengage Learning, 2010.
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