Gattegno, C. (1969). Mathematics with numbers in colour. Educational Explores Limited.
Style de citation Chicago (17e éd.)Gattegno, C. Mathematics with Numbers in Colour. Educational Explores Limited, 1969.
Style de citation MLA (8e éd.)Gattegno, C. Mathematics with Numbers in Colour. Educational Explores Limited, 1969.
Attention : ces citations peuvent ne pas être correctes à 100%.