(2000). Percentage Distribution of 6- to 12-year-olds, 1972-97. U.S. Department of Education.
Lua i Stíl Chicago (17ú heag.)Percentage Distribution of 6- to 12-year-olds, 1972-97. U.S. Department of Education, 2000.
Lua MLA (9ú heag.)Percentage Distribution of 6- to 12-year-olds, 1972-97. U.S. Department of Education, 2000.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.