Wright, R. J., Martland, J., & Stafford, A. K. (2006). Early numeracy: Assessment for teaching and intervention (2nd ed.). P. Chapman.
Lua i Stíl Chicago (17ú heag.)Wright, Robert J., Jim Martland, agus Ann K. Stafford. Early Numeracy: Assessment for Teaching and Intervention. 2nd ed. London: P. Chapman, 2006.
Lua MLA (9ú heag.)Wright, Robert J., et al. Early Numeracy: Assessment for Teaching and Intervention. 2nd ed. P. Chapman, 2006.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.