Cita APA (7th ed.)

Beth, E. W., & Piaget, J. (1966). Mathematical epistemology and psychology. D. Reidel.

Cita Chicago (17th ed.)

Beth, Evert W., i Jean Piaget. Mathematical Epistemology and Psychology. Dordrecht: D. Reidel, 1966.

Cita MLA (9th ed.)

Beth, Evert W., i Jean Piaget. Mathematical Epistemology and Psychology. D. Reidel, 1966.