Cohen, W. A. (2001). How to make it big as a consultant (3rd ed.). AMACOM.
Tohutoru Kātū Chicago (17th ed.)Cohen, William A. How to Make It Big as a Consultant. 3rd ed. New York: AMACOM, 2001.
Tohutoro MLA (9th ed.)Cohen, William A. How to Make It Big as a Consultant. 3rd ed. AMACOM, 2001.
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