Helen Dwight Reid Educational Foundation. (1989). Preventing school failure. Heldref Publications.
Lua i Stíl Chicago (17ú heag.)Helen Dwight Reid Educational Foundation. Preventing School Failure. Washington, D.C.: Heldref Publications, 1989.
Lua MLA (9ú heag.)Helen Dwight Reid Educational Foundation. Preventing School Failure. Heldref Publications, 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.