Cohen, W. A. (1990). The art of the leader. New Jersey: Prentice Hall.
Trích dẫn kiểu ChicagoCohen, William A. The Art of the Leader. New Jersey: Prentice Hall, 1990.
MLA citiranjeCohen, William A. The Art of the Leader. New Jersey: Prentice Hall, 1990.
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