Não informado. (1951). Educational Theory. John Dewey Society.
Lua i Stíl Chicago (17ú heag.)Não informado. Educational Theory. Urbana, Ill: John Dewey Society, 1951.
Lua MLA (8ú heag.)Não informado. Educational Theory. John Dewey Society, 1951.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.