National Council of Teachers of Mathematics, Fey, J. T., & Hirsch, C. R. (1992). Calculators in mathematics education. National Council of Teachers of Mathematics.
Citazione stile Chigago Style (17a edizione)National Council of Teachers of Mathematics, James T. Fey, e Christian R. Hirsch. Calculators in Mathematics Education. Reston, VA: National Council of Teachers of Mathematics, 1992.
Citatione MLA (9a ed.)National Council of Teachers of Mathematics, et al. Calculators in Mathematics Education. National Council of Teachers of Mathematics, 1992.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.