APA (7th ed.) Zitazioa

(2012). Number activities for children with mathematical learning difficulties / Mel Lever. [electronic resource].

Chicago Style (17th ed.) Zitazioa

Number Activities for Children with Mathematical Learning Difficulties / Mel Lever. [electronic Resource]. 2012.

MLA (9th ed.) Zitazioa

Number Activities for Children with Mathematical Learning Difficulties / Mel Lever. [electronic Resource]. 2012.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.