Aberin, M. A. Q. (2006). Intrinsic and extrinsic motivation, mathematics problem-solving performance in graded and non-graded work.
Παραπομπή σε μορφή Chicago (17η εκδ.)Aberin, Maria Alva Q. Intrinsic and Extrinsic Motivation, Mathematics Problem-solving Performance in Graded and Non-graded Work. 2006.
Παραπομπή σε μορφή MLA (9th εκδ.)Aberin, Maria Alva Q. Intrinsic and Extrinsic Motivation, Mathematics Problem-solving Performance in Graded and Non-graded Work. 2006.
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