Wright, R. J., Martland, J., & Stafford, A. K. (2006). Early numeracy: Assessment for teaching and intervention (2nd ed.). P. Chapman.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWright, Robert J., Jim Martland, और Ann K. Stafford. Early Numeracy: Assessment for Teaching and Intervention. 2nd ed. London: P. Chapman, 2006.
एमएलए (9वां संस्करण) प्रशस्ति पत्रWright, Robert J., et al. Early Numeracy: Assessment for Teaching and Intervention. 2nd ed. P. Chapman, 2006.
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