Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

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