My Attempt To Stop Cracking My Knuckles

Works Cited:

Halper, E. (2010). What is Behavior Modification? Retrieved from http://www.livestrong.com/article/105661-behavior-modification/


Fung, B. (2012, May 30). Cracking Your Knuckles Can Give You Arthritis: Science or Myth? The Atlantic. Retrieved from http://www.theatlantic.com/health/archive/2012/05/cracking-your-knuckles-can-give-you-arthritis-science-or-myth/257851/