Gaya APA

Bird, R., Bowen, J. (2013). THe Dyscalculia toolkit : supporting learning difficulties in maths (2nd ed). Los Angeles: Sage.

Gaya MLA

Bird, Ronit., Bowen, Jude. "THe Dyscalculia toolkit : supporting learning difficulties in maths". 2nd ed Los Angeles: Sage, 2013. Text.