Vitale, J. (2007). The seven lost secrets of success: Million dollar ideas of Bruce Barton, America's forgotten genius. John Wiley & Sons.
Cita Chicago (17th ed.)Vitale, Joe. The Seven Lost Secrets of Success: Million Dollar Ideas of Bruce Barton, America's Forgotten Genius. Hoboken, N.J.: John Wiley & Sons, 2007.
Cita MLA (8th ed.)Vitale, Joe. The Seven Lost Secrets of Success: Million Dollar Ideas of Bruce Barton, America's Forgotten Genius. John Wiley & Sons, 2007.
Atenció: Aquestes cites poden no estar 100% correctes.