Condition of Education, 1999: Overview. US Department of Education.
Lua i Stíl Chicago (17ú heag.)Condition of Education, 1999: Overview. US Department of Education.
Lua MLA (9ú heag.)Condition of Education, 1999: Overview. US Department of Education.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.