Green, L. (2007). Lead with Your Heart: Sell Happiness and You and Your Business Will Flourish. HRD Press.
Chicago-Zitierstil (17. Ausg.)Green, Lewis. Lead with Your Heart: Sell Happiness and You and Your Business Will Flourish. Amherst: HRD Press, 2007.
MLA-Zitierstil (9. Ausg.)Green, Lewis. Lead with Your Heart: Sell Happiness and You and Your Business Will Flourish. HRD Press, 2007.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.