Burns, M. (2010). As Easy as Pi: Picture Books Are Perfect for Teaching Math.
Chicago-Zitierstil (17. Ausg.)Burns, Marilyn. As Easy as Pi: Picture Books Are Perfect for Teaching Math. 2010.
MLA-Zitierstil (9. Ausg.)Burns, Marilyn. As Easy as Pi: Picture Books Are Perfect for Teaching Math. 2010.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.