Haylock, D., & Cockburn, A. (2003). Understanding mathematics in the lower primary years: A guide for teachers of children 3-8 (Second edition.). Paul Chapman Pub. ; Sage Publications.
Lua i Stíl Chicago (17ú heag.)Haylock, Derek, agus Anne Cockburn. Understanding Mathematics in the Lower Primary Years: A Guide for Teachers of Children 3-8. Second edition. London : Thousand Oaks, Calif.: Paul Chapman Pub. ; Sage Publications, 2003.
Lua MLA (8ú heag.)Haylock, Derek, agus Anne Cockburn. Understanding Mathematics in the Lower Primary Years: A Guide for Teachers of Children 3-8. Second edition. Paul Chapman Pub. ; Sage Publications, 2003.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.