Covington, M. V. (1992). Making the grade: A self-worth perspective on motivation and school reform ([1st publ.].). Cambridge University Press.
Cita Chicago Style (17a ed.)Covington, Martin V. Making the Grade: A Self-worth Perspective on Motivation and School Reform. [1st publ.]. Cambridge: Cambridge University Press, 1992.
Cita MLA (9a ed.)Covington, Martin V. Making the Grade: A Self-worth Perspective on Motivation and School Reform. [1st publ.]. Cambridge University Press, 1992.
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