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引文Cohen, William A. The Art of the Leader. New Jersey: Prentice Hall, 1990.
警告：這些引文格式不一定是100％准確.