National Council of Teachers of Mathematics & Payne, J. N. (1975). Mathematics learning in early childhood. NCTM.
Citace podle Chicago (17th ed.)National Council of Teachers of Mathematics a Joseph Neal Payne. Mathematics Learning in Early Childhood. Reston, VA: NCTM, 1975.
Citace podle MLA (9th ed.)National Council of Teachers of Mathematics a Joseph Neal Payne. Mathematics Learning in Early Childhood. NCTM, 1975.
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