(2012). Number activities for children with mathematical learning difficulties / Mel Lever. [electronic resource].
Lua i Stíl Chicago (17ú heag.)Number Activities for Children with Mathematical Learning Difficulties / Mel Lever. [electronic Resource]. 2012.
Lua MLA (9ú heag.)Number Activities for Children with Mathematical Learning Difficulties / Mel Lever. [electronic Resource]. 2012.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.