Não informado. (2014). Investigations in Mathematics Learning. Research Council on Mathematics Learning.
Chicago-Zitierstil (17. Ausg.)Não informado. Investigations in Mathematics Learning. Memphis, Tenn: Research Council on Mathematics Learning, 2014.
MLA-Zitierstil (8. Ausg.)Não informado. Investigations in Mathematics Learning. Research Council on Mathematics Learning, 2014.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.