Piaget, J., Burrell, P., Fishbein, H. D., Inhelder, B., & Leake, L. (1975). The origin of the idea of chance in children. Norton.
Cita Chicago (17th ed.)Piaget, Jean, Paul Burrell, Harold D. Fishbein, Barbel Inhelder, i Lowell Leake. The Origin of the Idea of Chance in Children. New York: Norton, 1975.
Cita MLA (9th ed.)Piaget, Jean, et al. The Origin of the Idea of Chance in Children. Norton, 1975.
Atenció: Aquestes cites poden no estar 100% correctes.