Shepard, L. A., & Smith, M. L. (1989). Flunking grades: Research and policies on retention. Falmer Press.
Chicago Style (17th ed.) CitationShepard, Lorrie A., and Mary Lee Smith. Flunking Grades: Research and Policies on Retention. London: Falmer Press, 1989.
ציטוט MLAShepard, Lorrie A., and Mary Lee Smith. Flunking Grades: Research and Policies on Retention. Falmer Press, 1989.
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