Helen Dwight Reid Educational Foundation. (1989). Preventing school failure. Heldref Publications.
Citace podle Chicago (17th ed.)Helen Dwight Reid Educational Foundation. Preventing School Failure. Washington, D.C.: Heldref Publications, 1989.
Citace podle MLA (9th ed.)Helen Dwight Reid Educational Foundation. Preventing School Failure. Heldref Publications, 1989.
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