Gattegno, C. (1963). Mathematics with numbersin colour: Study of numbers. Educational Explorers Limited.
Chicago Style (17th ed.) CitationGattegno, Caleb. Mathematics with Numbersin Colour: Study of Numbers. Educational Explorers Limited, 1963.
MLA (8th ed.) CitationGattegno, Caleb. Mathematics with Numbersin Colour: Study of Numbers. Educational Explorers Limited, 1963.
Warning: These citations may not always be 100% accurate.