Deismireacht APA

Guffey, M. E. (1999). Business English (6th ed.). Cincinnati, Ohio: South-Western College.

Trích dẫn kiểu Chicago

Guffey, Mary Ellen. Business English. 6th ed. Cincinnati, Ohio: South-Western College, 1999.

Deismireacht MLA

Guffey, Mary Ellen. Business English. 6th ed. Cincinnati, Ohio: South-Western College, 1999.

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