Educational Research Association. (1920). Journal of Educational Research. Heldref Publications.
Lua i Stíl Chicago (17ú heag.)Educational Research Association. Journal of Educational Research. Washington: Heldref Publications, 1920.
Lua MLA (8ú heag.)Educational Research Association. Journal of Educational Research. Heldref Publications, 1920.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.