Não informado. (1955). Mathematics Teaching. Association of Teachers of Mathematics.
Chicago-Zitierstil (17. Ausg.)Não informado. Mathematics Teaching. Derby, Inglaterra: Association of Teachers of Mathematics, 1955.
MLA-Zitierstil (8. Ausg.)Não informado. Mathematics Teaching. Association of Teachers of Mathematics, 1955.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.