Cofnodi Dyfyniadau
Dyfyniad APA
ebrary, Inc, Wigfield, A., & Eccles, J. S. (2002). Development of achievement motivation. Academic Press.
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Dyfyniad Arddull Chicago
ebrary, Inc, Allan Wigfield, and Jacquelynne S. Eccles. Development of Achievement Motivation. San Diego: Academic Press, 2002.
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Dyfyniad MLA
ebrary, Inc, et al. Development of Achievement Motivation. Academic Press, 2002.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.