Gattegno, C. (1963). Now Johnny can do arithmetic: A guide for the use of the Cuisenaire materials (Rev ed.). Educational Explorers.
Citace podle Chicago (17th ed.)Gattegno, Caleb. Now Johnny Can Do Arithmetic: A Guide for the Use of the Cuisenaire Materials. Rev ed. Reading, Berkshire: Educational Explorers, 1963.
Citace podle MLA (8th ed.)Gattegno, Caleb. Now Johnny Can Do Arithmetic: A Guide for the Use of the Cuisenaire Materials. Rev ed. Educational Explorers, 1963.
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