O'Hair, H. D., & H. Dan O'Hair; James S. O'Rourke IV; Mary John O'Hair. (2001). Business communication: A framework for success. Cincinnati: South-Western College Pub.
Trích dẫn kiểu ChicagoO'Hair, H. Dan, và H. Dan O'Hair; James S. O'Rourke IV; Mary John O'Hair. Business Communication: A Framework for Success. Cincinnati: South-Western College Pub, 2001.
Deismireacht MLAO'Hair, H. Dan, và H. Dan O'Hair; James S. O'Rourke IV; Mary John O'Hair. Business Communication: A Framework for Success. Cincinnati: South-Western College Pub, 2001.
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