Não informado. (1989). Adults Learning. National Institute of Adult Continuing Education.
Lua i Stíl Chicago (17ú heag.)Não informado. Adults Learning. Leicester, Inglaterra: National Institute of Adult Continuing Education, 1989.
Lua MLA (8ú heag.)Não informado. Adults Learning. National Institute of Adult Continuing Education, 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.