Guffey, M. E., & Loewy, D. (2010). Essentials of business communication (8th ed.). South-Western Cengage Learning.
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Chicago Style (17th ed.) Zitazioa
Guffey, Mary Ellen, eta Dana Loewy. Essentials of Business Communication. 8th ed. Mason, OH: South-Western Cengage Learning, 2010.
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MLA (9th ed.) Zitazioa
Guffey, Mary Ellen, eta Dana Loewy. Essentials of Business Communication. 8th ed. South-Western Cengage Learning, 2010.
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