Não informado. (1958). Educational Research. National Foundation for Educational Research.
Lua i Stíl Chicago (17ú heag.)Não informado. Educational Research. Oxfordshire, Inglaterra: National Foundation for Educational Research, 1958.
Lua MLA (8ú heag.)Não informado. Educational Research. National Foundation for Educational Research, 1958.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.