APA (7e ed.) Bronvermelding

Carruthers, E., & Worthington, M. (2006). Children's mathematics: Making marks, making meaning (Second Edition.). Sage.

Chicago (17e ed.) Bronvermelding

Carruthers, Elizabeth, en Maulfry Worthington. Children's Mathematics: Making Marks, Making Meaning. Second Edition. London ; Thousand Oaks, Calif.: Sage, 2006.

MLA (8e ed.) Bronvermelding

Carruthers, Elizabeth, en Maulfry Worthington. Children's Mathematics: Making Marks, Making Meaning. Second Edition. Sage, 2006.