National Council of Teachers of Mathematics. (1994). Teaching children mathematics. National Council of Teachers of Mathematics.
Chicago-Zitierstil (17. Ausg.)National Council of Teachers of Mathematics. Teaching Children Mathematics. Reston, Va: National Council of Teachers of Mathematics, 1994.
MLA-Zitierstil (9. Ausg.)National Council of Teachers of Mathematics. Teaching Children Mathematics. National Council of Teachers of Mathematics, 1994.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.