(2002). Making sense of fractions, ratios, and proportions: 2002 yearbook. National Council of Teachers of Mathematics.
Chicago-Zitierstil (17. Ausg.)Making Sense of Fractions, Ratios, and Proportions: 2002 Yearbook. Reston, Va: National Council of Teachers of Mathematics, 2002.
MLA-Zitierstil (9. Ausg.)Making Sense of Fractions, Ratios, and Proportions: 2002 Yearbook. National Council of Teachers of Mathematics, 2002.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.