Cita APA (7a ed.)
Somervell, E. L. (1975). A Rhythmic approach to mathematics. The National Council of Teachers of Mathematics.
Cita Chicago Style (17a ed.)
Somervell, Edith L. A Rhythmic Approach to Mathematics. Estados Unidos: The National Council of Teachers of Mathematics, 1975.
Cita MLA (9a ed.)
Somervell, Edith L. A Rhythmic Approach to Mathematics. The National Council of Teachers of Mathematics, 1975.
Precaución: Estas citas no son 100% exactas.