National Council of Teachers of Mathematics. (1994). Teaching children mathematics. National Council of Teachers of Mathematics.
Chicago-referens (17:e uppl.)National Council of Teachers of Mathematics. Teaching Children Mathematics. Reston, Va: National Council of Teachers of Mathematics, 1994.
MLA-referens (9:e uppl.)National Council of Teachers of Mathematics. Teaching Children Mathematics. National Council of Teachers of Mathematics, 1994.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.