Não informado. (1969). Today's education. National Education Association.
Lua i Stíl Chicago (17ú heag.)Não informado. Today's Education. Washington: National Education Association, 1969.
Lua MLA (8ú heag.)Não informado. Today's Education. National Education Association, 1969.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.