Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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