【作者(必填)】Richard M. Ryan, Edward L. Deci

【文题(必填)】Intrinsic and Extrinsic Motivations: Classic Definitions and New Directions

【年份(必填)】Contemporary Educational Psychology,Volume 25, Issue 1, January 2000, Pages 54–67

【全文链接或数据库名称(选填)】http://www.sciencedirect.com/science/article/pii/S0361476X99910202