Holiday, R. (2014). Obstacle is the way: The ancient art of turning adversity to advantage (NA.). Profile Books.
Lua i Stíl Chicago (17ú heag.)Holiday, Ryan. Obstacle Is the Way: The Ancient Art of Turning Adversity to Advantage. NA. London: Profile Books, 2014.
Lua MLA (9ú heag.)Holiday, Ryan. Obstacle Is the Way: The Ancient Art of Turning Adversity to Advantage. NA. Profile Books, 2014.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.