Holiday, R. (2014). Obstacle is the way: The ancient art of turning adversity to advantage (NA.). Profile Books.
Chicago-Zitierstil (17. Ausg.)Holiday, Ryan. Obstacle Is the Way: The Ancient Art of Turning Adversity to Advantage. NA. London: Profile Books, 2014.
MLA-Zitierstil (9. Ausg.)Holiday, Ryan. Obstacle Is the Way: The Ancient Art of Turning Adversity to Advantage. NA. Profile Books, 2014.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.