Trafton, P. R. (1989). New directions for elementary school mathematics. National Council of Teachers of Mathematics.
Style de citation Chicago (17e éd.)Trafton, Paul R. New Directions for Elementary School Mathematics. Reston, Va.: National Council of Teachers of Mathematics, 1989.
Style de citation MLA (8e éd.)Trafton, Paul R. New Directions for Elementary School Mathematics. National Council of Teachers of Mathematics, 1989.
Attention : ces citations peuvent ne pas être correctes à 100%.