Carruthers, E., & Worthington, M. (2006). Children's mathematics: Making marks, making meaning (Second Edition.). Sage.
Lua i Stíl Chicago (17ú heag.)Carruthers, Elizabeth, agus Maulfry Worthington. Children's Mathematics: Making Marks, Making Meaning. Second Edition. London ; Thousand Oaks, Calif.: Sage, 2006.
Lua MLA (8ú heag.)Carruthers, Elizabeth, agus Maulfry Worthington. Children's Mathematics: Making Marks, Making Meaning. Second Edition. Sage, 2006.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.