ebrary, Inc, Sansone, C., & Harackiewicz, J. M. (2000). Intrinsic and extrinsic motivation: The search for optimal motivation and performance. Academic Press.
Chicago-Zitierstil (17. Ausg.)ebrary, Inc, Carol Sansone, und Judith M. Harackiewicz. Intrinsic and Extrinsic Motivation: The Search for Optimal Motivation and Performance. San Diego: Academic Press, 2000.
MLA-Zitierstil (9. Ausg.)ebrary, Inc, et al. Intrinsic and Extrinsic Motivation: The Search for Optimal Motivation and Performance. Academic Press, 2000.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.