Cita APA (7th ed.)

Wright, R. J., Martland, J., & Stafford, A. K. (2006). Early numeracy: Assessment for teaching and intervention (2nd edition.). Paul Chapman.

Cita Chicago (17th ed.)

Wright, Robert J., Jim Martland, i Ann K. Stafford. Early Numeracy: Assessment for Teaching and Intervention. 2nd edition. London ; Thousand Oaks, Calif.: Paul Chapman, 2006.

Cita MLA (8th ed.)

Wright, Robert J., et al. Early Numeracy: Assessment for Teaching and Intervention. 2nd edition. Paul Chapman, 2006.