(2012). Number activities for children with mathematical learning difficulties / Mel Lever. [electronic resource].
Cita Chicago (17th ed.)Number Activities for Children with Mathematical Learning Difficulties / Mel Lever. [electronic Resource]. 2012.
Cita MLA (9th ed.)Number Activities for Children with Mathematical Learning Difficulties / Mel Lever. [electronic Resource]. 2012.
Atenció: Aquestes cites poden no estar 100% correctes.