Dyfyniad APA

Guffey, M. E. (1995). Essentials of business communication (3rd ed.). South-Western College.

Dyfyniad Arddull Chicago

Guffey, Mary Ellen. Essentials of Business Communication. 3rd ed. Cincinnati, Ohio: South-Western College, 1995.

Dyfyniad MLA

Guffey, Mary Ellen. Essentials of Business Communication. 3rd ed. South-Western College, 1995.

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