O'Connor, K. (2013). The school leader's guide to grading. Solution Tree Press.
Lua i Stíl Chicago (17ú heag.)O'Connor, Ken. The School Leader's Guide to Grading. Bloomington, Ind.: Solution Tree Press, 2013.
Lua MLA (9ú heag.)O'Connor, Ken. The School Leader's Guide to Grading. Solution Tree Press, 2013.
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