Não informado. (1950). Educational Researcher. American Educational Research Association.
Lua i Stíl Chicago (17ú heag.)Não informado. Educational Researcher. Washington: American Educational Research Association, 1950.
Lua MLA (8ú heag.)Não informado. Educational Researcher. American Educational Research Association, 1950.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.