Παραπομπή APA

Sansone, C., & Harackiewicz, J. M. (2000). Intrinsic and extrinsic motivation: The search for optimal motivation and performance. San Diego: Academic Press.

Παραπομπή Chicago Style

Sansone, Carol., and Judith M. Harackiewicz. Intrinsic and Extrinsic Motivation: The Search for Optimal Motivation and Performance. San Diego: Academic Press, 2000.

Παραπομπή MLA

Sansone, Carol., and Judith M. Harackiewicz. Intrinsic and Extrinsic Motivation: The Search for Optimal Motivation and Performance. San Diego: Academic Press, 2000.

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