Ireson, J., & Hallam, S. (2003). Ability grouping in education. Paul Chapman ; Sage.
Lua i Stíl Chicago (17ú heag.)Ireson, Judith, agus Susan Hallam. Ability Grouping in Education. London: Paul Chapman ; Sage, 2003.
Lua MLA (8ú heag.)Ireson, Judith, agus Susan Hallam. Ability Grouping in Education. Paul Chapman ; Sage, 2003.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.