Cita APA (7a ed.)
Carruthers, E., & Worthington, M. (2006). Children's mathematics: Making marks, making meaning (2nd ed.). Sage.
Cita Chicago Style (17a ed.)
Carruthers, Elizabeth, y Maulfry Worthington. Children's Mathematics: Making Marks, Making Meaning. 2nd ed. London ; Thousand Oaks, Calif.: Sage, 2006.
Cita MLA (9a ed.)
Carruthers, Elizabeth, y Maulfry Worthington. Children's Mathematics: Making Marks, Making Meaning. 2nd ed. Sage, 2006.
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