Napoleon Hill
Robert D. Hisrich
John Carreyrou
United States. General Accounting Office
Brad Feld
Colin Barrow
Luvai F. Motiwalla
Scott Kupor
Mary Gehlhar
Entrepreneur Magazine
Elizabeth Higginbotham
Hal Root
Rachel Bridge
Marc H. Meyer, Frederick G. Crane
Judith H. McQuown
Alejandro Cremades
Mike P. McKeever
Jerome A. Katz
Sebastian Mallaby
Rhonda Abrams