APA Citation

Gattegno, C. (1969). Mathematics with numbers in colour. Educational Explores Limited.

Chicago Style Citation

Gattegno, C. Mathematics With Numbers in Colour. Educational Explores Limited, 1969.

MLA Citation

Gattegno, C. Mathematics With Numbers in Colour. Educational Explores Limited, 1969.

Warning: These citations may not always be 100% accurate.