Cohen, W. A. (1985). How to make it big as a consultant. Amacom.
Chicago-čujuhus (17. p.)Cohen, William A. How to Make It Big as a Consultant. New York: Amacom, 1985.
MLA-čujuhus (9. p.)Cohen, William A. How to Make It Big as a Consultant. Amacom, 1985.
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