Não informado. (1973). Illinois school research and development. Illinois Association for Supervision and Curriculum Development.
Lua i Stíl Chicago (17ú heag.)Não informado. Illinois School Research and Development. Nottingham, Inglaterra: Illinois Association for Supervision and Curriculum Development, 1973.
Lua MLA (8ú heag.)Não informado. Illinois School Research and Development. Illinois Association for Supervision and Curriculum Development, 1973.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.