Leider, R. (2010). The power of purpose: Find meaning, live longer, better (2nd ed.). Berrett-Koehler Publishers.
Chicago-Zitierstil (17. Ausg.)Leider, Richard. The Power of Purpose: Find Meaning, Live Longer, Better. 2nd ed. San Francisco: Berrett-Koehler Publishers, 2010.
MLA-Zitierstil (9. Ausg.)Leider, Richard. The Power of Purpose: Find Meaning, Live Longer, Better. 2nd ed. Berrett-Koehler Publishers, 2010.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.