Não informado. (1972). Learning. Education Today.
Lua i Stíl Chicago (17ú heag.)Não informado. Learning. Greensboro, NC: Education Today, 1972.
Lua MLA (8ú heag.)Não informado. Learning. Education Today, 1972.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.