Vitale, J. (2007). The seven lost secrets of success: Million dollar ideas of Bruce Barton, America's forgotten genius. John Wiley & Sons.
Citazione stile Chigago Style (17a edizione)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.
Citatione MLA (8a ed.)Vitale, Joe. The Seven Lost Secrets of Success: Million Dollar Ideas of Bruce Barton, America's Forgotten Genius. John Wiley & Sons, 2007.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.