APA (7th ed.) Citation

Gattegno, C. (1963). Now Johnny can do arithmetic: A guide for the use of the Cuisenaire materials (Rev ed.). Educational Explorers.

Chicago Style (17th ed.) Citation

Gattegno, Caleb. Now Johnny Can Do Arithmetic: A Guide for the Use of the Cuisenaire Materials. Rev ed. Reading, Berkshire: Educational Explorers, 1963.

MLA (8th ed.) Citation

Gattegno, Caleb. Now Johnny Can Do Arithmetic: A Guide for the Use of the Cuisenaire Materials. Rev ed. Educational Explorers, 1963.