Galván Anaya, F. (1967). National council of teachers of mathematics. Trillas.
Lua i Stíl Chicago (17ú heag.)Galván Anaya, Federico. National Council of Teachers of Mathematics. Trillas, 1967.
Lua MLA (9ú heag.)Galván Anaya, Federico. National Council of Teachers of Mathematics. Trillas, 1967.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.