Dyfyniad APA

Trafton, P. R. (1989). New directions for elementary school mathematics. National Council of Teachers of Mathematics.

Dyfyniad Arddull Chicago

Trafton, Paul R. New Directions for Elementary School Mathematics. Reston, Va.: National Council of Teachers of Mathematics, 1989.

Dyfyniad MLA

Trafton, Paul R. New Directions for Elementary School Mathematics. National Council of Teachers of Mathematics, 1989.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.