Dyfyniad APA

Somervell, E. L. (1975). A rhythmic approach to mathematics. National Council of Teachers of Mathematics.

Dyfyniad Arddull Chicago

Somervell, Edith L. A Rhythmic Approach to Mathematics. [Reston, Va.]: National Council of Teachers of Mathematics, 1975.

Dyfyniad MLA

Somervell, Edith L. A Rhythmic Approach to Mathematics. National Council of Teachers of Mathematics, 1975.

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