Galván Anaya, F. (1967). National council of teachers of mathematics. Trillas.
Chicago-čujuhus (17. p.)Galván Anaya, Federico. National Council of Teachers of Mathematics. Trillas, 1967.
MLA-čujuhus (9. p.)Galván Anaya, Federico. National Council of Teachers of Mathematics. Trillas, 1967.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.