APA ציטוט

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.

ציטוט MLA

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