Description: Edward L Deci1 and Richard M Ryan1 Int J Behav Nutr Phys Act. 2012; 9: 24. Published online 2012 March 2. doi: 10.1186/1479-5868-9-24 Link: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3312850/Creative commons non-commercial share alikeOpen AccessResource tag: SDTItem for sale: on Sat, 01/11/2014 - 00:27 chriswagner