Barnett Clarke, C., Fisher, W. p., Marks, R., & Ross, S. Developing essential understanding of rational numbers for teaching mathematics in grades 3-5 (1a ed., 3a reimpresión.).
Chicago-referens (17:e uppl.)Barnett Clarke, Carne, William páginas Fisher, Rick Marks, och Sharon Ross. Developing Essential Understanding of Rational Numbers for Teaching Mathematics in Grades 3-5. 1a ed., 3a reimpresión.
MLA-referens (8:e uppl.)Barnett Clarke, Carne, et al. Developing Essential Understanding of Rational Numbers for Teaching Mathematics in Grades 3-5. 1a ed., 3a reimpresión.
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