Não informado. (1989). Adult Learning. American Association for Adult & Continuing Education.
Lua i Stíl Chicago (17ú heag.)Não informado. Adult Learning. Washington: American Association for Adult & Continuing Education, 1989.
Lua MLA (8ú heag.)Não informado. Adult Learning. American Association for Adult & Continuing Education, 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.