Flores, A., Dougherty, B. J., Everett, L., & Sophian, C. Developing essential understanding of number and numeration for teaching mathematics in prekindergarten - grade 2 (3a ed., reimpresión.).
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रFlores, Alfinio, Barbara J. Dougherty, Louis Everett, और Catherine Sophian. Developing Essential Understanding of Number and Numeration for Teaching Mathematics in Prekindergarten - Grade 2. 3a ed., reimpresión.
एमएलए (8वां संस्करण) प्रशस्ति पत्रFlores, Alfinio, et al. Developing Essential Understanding of Number and Numeration for Teaching Mathematics in Prekindergarten - Grade 2. 3a ed., reimpresión.
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