APA (7e ed.) Bronvermelding

Gattegno, C. (1963). For the teaching of mathematics. Educational Explorers.

Chicago (17e ed.) Bronvermelding

Gattegno, C. For the Teaching of Mathematics. Reading, U.K.: Educational Explorers, 1963.

MLA (9e ed.) Bronvermelding

Gattegno, C. For the Teaching of Mathematics. Educational Explorers, 1963.