Cita APA (7a ed.)
National Council of Teachers of Mathematics. (1965). Instruction in arithmetic: Twenty-fifth yearbook (3a edición.).
Cita estilo Chicago (17a ed.)
National Council of Teachers of Mathematics. Instruction in Arithmetic: Twenty-fifth Yearbook. 3a edición. 1965.
Cita MLA (9a ed.)
National Council of Teachers of Mathematics. Instruction in Arithmetic: Twenty-fifth Yearbook. 3a edición. 1965.
Precaución: Estas citas no son 100% exactas.