COHEN W. A., . (1993). HOW TO MAKE IT BIG AS A CONSULTANT. NEW YORK: AMACOM.
COHEN WILLIAM A, . 1993. HOW TO MAKE IT BIG AS A CONSULTANT. NEW YORK: AMACOM.
COHEN WILLIAM A, . HOW TO MAKE IT BIG AS A CONSULTANT. NEW YORK: AMACOM. 1993.