Helen Dwight Reid Educational Foundation. (1989). Preventing school failure. Heldref Publications.
Chicago-viite (17. p.)Helen Dwight Reid Educational Foundation. Preventing School Failure. Washington, D.C.: Heldref Publications, 1989.
MLA-viite (9. p.)Helen Dwight Reid Educational Foundation. Preventing School Failure. Heldref Publications, 1989.
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